ACX5048,ACX5096,SRX Series,vSRX. The Internet Protocol (IP) specifies a loopback network with the (IPv4) address 127.0.0.0/8. Most IP implementations support a loopback interface (lo0) to represent the loopback facility. Linphone is an open source SIP client for HD voice/video calls, 1-to-1 and group instant messaging, conference calls etc. Available for iOS, Android, Windows, macOS and GNU/Linux.
-->Original KB number: 10041
This guide enables your Skype for Business users to IM and talk with Skype for Business contacts in other organizations, and also to Skype users who are signed in with a Microsoft account (formerly Windows Live ID). And you want to set it up so that everything works right the first time.
Note
This is not the same as setting up external contacts in Outlook or sharing my website with outside people. Because each type of external contact has a different purpose.
A Skype for Business external contact is someone outside your organization who's using a compatible IM and conferencing client - either Skype for Business or Skype. However, all that's required for Outlook external contacts or website sharing is a valid email address. For more information, see Collaborating with people outside your organization.
First, we'll ask you a few quick questions about your Microsoft 365 setup. Then we'll give you all the information you need to complete up to four tasks.
This should take less than an hour of your time, plus up to 24 hours (for network propagation) if you haven't turned on external communications yet.
To check your Microsoft 365 version, sign in and go to Admin > Licensing.
What version of Microsoft 365 do you have?
Microsoft 365 creates a domain for you when you sign up (the domain name includes .onmicrosoft.com
). But most companies prefer to use their own domain, like fabrikam.com
, for their business email addresses and website.
If your current domain name ends in .onmicrosoft.com
, you don't have a custom domain. For more information, see Add a domain to Microsoft 365.
Are you using a custom domain with Office 365?
To set up your custom domain, sign in and select Email address in the Getting Started pane. (If you don't see the Getting Started pane, select Setup > Open the Getting Started pane.) For more information, see Add a domain to Microsoft 365.
Have you already set up your custom domain?
After that make sure everything works as expected by running Microsoft 365 Skype for Business Domain Name Server (DNS) Connectivity Test.
When you've confirmed that your custom domain is set up correctly, continue to the next step.
Sign in to Microsoft 365, and go to Admin > Service Settings > IM, meetings and conferencing > External communications. For more information, see Allow users to contact external Skype for Business users.
First, if you haven't already done so, turn on external communications for everyone in your organization.
Important
It may take up to 24 hours for your changes to take effect. You can save your current progress and return if you need to.
If you want to communicate with external Skype for Business users, you'll need to make sure the admin in the other organization has set up external communications as well.
Do you want your users to communicate with Skype for Business users in other organizations?
It's best to take the time and set up your custom domain now. The rest of this process will make much more sense after you've done so. Our goal: to help you get set up right the first time, so you can focus on your work and not on your software.
To set up your custom domain, sign in and select Email address in the Getting Started pane. (Go to Setup > Open the Getting Started pane if you don't see it.) For more information, see Add a domain to Microsoft 365.
After that make sure everything works as expected by running Microsoft 365 Skype for Business Domain Name Server (DNS) Connectivity Test.
Sign in to Microsoft 365, and go to Admin > Service Settings > IM, meetings and conferencing > External communications. For more information, see Allow users to contact external Skype for Business users.
First, if you haven't already done so, turn on external communications for everyone in your organization.
Important
It may take up to 24 hours for your changes to take effect. You can save your current progress and return if you need to.
If you want to communicate with external Skype for Business users, you'll need to make sure the admin in the other organization has set up external communications as well.
Do you want your users to communicate with Skype for Business users in other organizations?
Sign in to Microsoft 365, and go to Admin > Service Settings > IM, meetings and conferencing > External communications. For more information, see Allow users to contact external Skype for Business users.
First, if you haven't already done so, turn on external communications for everyone in your organization.
Important
It may take up to 24 hours for your changes to take effect. You can save your current progress and return if you need to.
If you want to communicate with external Skype for Business users, you'll need to make sure the admin in the other organization has set up external communications as well.
Do you want your users to communicate with Skype for Business users in other organizations?
To communicate with external Skype for Business users:
Contact the admin in the other organization using this email template.
Once they've turned on external communications, you and the other admin can add each other as Skype for Business contacts to test things out.
After you and the other admin have verified that you can use Skype for Business to communicate with each other, go to the next step.
Use this email template to let your users know how adding external contacts works in your organization. The template includes links to these important end-user topics:
Can you now communicate with external Skype for Business or Skype contacts?
We're sorry you're having trouble setting up external communications.
If you've completed all the tasks in this guide, are able to sign in to Microsoft 365 using your custom domain name, and still can't communicate with outside users, here are some additional resources:
Microsoft 365 creates a domain for you when you sign up (the domain name includes .onmicrosoft.com
). But most companies prefer to use their own domain, like fabrikam.com
, for their business email addresses and website.
If your current domain name ends in .onmicrosoft.com
, you don't have a custom domain. For more information, see Add a domain to Microsoft 365.
Are you using a custom domain with Microsoft 365?
First, if you haven't already done so, turn on external communications for everyone in your organization and configure any domain exceptions you may want to implement. If you want to communicate with other Lync or Skype for Business organizations, it's recommended that you add your partner's organizations domain to the list of Allowed domains.
Sign in to Microsoft 365, and go to Admin Center > Settings > Services & add-ins > Skype for Business > External communications. For more information, see Allow users to contact external Skype for Business users.
Important
It may take up to 24 hours for your changes to take effect. You can save your current progress and return if you need to.
If you want to communicate with other Skype for Business organization, you'll need to make sure the admin in the other organization has set up external communications as well.
If you want to allow your Skype for Business Online users to communicate with Skype consumer users? If so, make sure the following switch is enabled:
Have you allowed your users to communicate with Skype for Business users in other organizations?
Microsoft 365 creates a domain for you when you sign up (the domain name includes .onmicrosoft.com
). But most companies prefer to use their own domain, like fabrikam.com
, for their business email addresses and website.
If your current domain name ends in .onmicrosoft.com
, you don't have a custom domain. For more information, see Add a domain to Microsoft 365.
Are you using a custom domain with Microsoft 365?
To set up your custom domain, sign in and go to Admin > Setup. For more information, see Add a domain to Microsoft 365.
Have you already set up your custom domain?
It's best to take the time and set up your custom domain now. The rest of this process will make much more sense once you're done adding your own domain. Our goal: to help you get set up right the first time, so you can focus on your work, and not on your software.
To set up your custom domain, sign in and go to Admin > Setup. For more information, see Add a domain to Microsoft 365.
Run the domain troubleshooter:
Go to the Microsoft 365 admin center and select Domains.
Select your custom domain name, and then select Fix Issues.
Now make sure everything works as expected by running the domain troubleshooter in the Microsoft 365 admin center.
When you see a message that says everything is set up correctly, you can continue the next step.
If you have a firewall or proxy setup in your environment, make sure to configure it to exclude the Office 365 URLs and IP address ranges. If you need help with this step, contact Microsoft 365 Support.
Sign in to Microsoft 365, and go to Admin Center > Settings > Services & add-ins > Skype for Business > External communications. For more information, see Allow users to contact external Skype for Business users.
First, if you haven't already done so, turn on external communications for everyone in your organization. If you want to communicate with other Lync or Skype for Business organizations, it's recommended that you add your partner's organizations domain to the list of Allowed domains.
Important
It may take up to 24 hours for your changes to take effect. You can save your current progress and return if you need to.
If you want to communicate with external Skype for Business users, you'll need to make sure the admin in the other organization has set up external communications as well.
Do you want your users to communicate with Skype for Business users in other organizations?
The last step:
Can you now communicate with external Skype for Business or Skype contacts?
Original KB number: 10054
Note
We'll begin by asking you questions about your installation and the symptoms you're experiencing. Then we'll take you through a series of troubleshooting steps and configuration checks that are specific to your situation.
Important
Some troubleshooting steps are different depending on the type of installation you have. Please complete each troubleshooting step, even if it doesn't seem to apply to you.
The amount of time you spend will depend on the type of installation you have, and the causes of your sign-in issues.
The first step is to try to sign in with your credentials in another location: Microsoft 365 Web Scheduler.
In most cases, both your sign-in address and user name look like one of these examples:
someone@example.com
someone@example.onmicrosoft.com
Can you sign in to Microsoft 365 Web Scheduler at https://sched.lync.com?
If you're able to successfully sign in to Microsoft 365 Web Scheduler, try signing in again with the same type of credentials:
someone@example.com
or someone@example.onmicrosoft.com
Were you able to sign in?
If you've forgotten your password or it's no longer working, use the Microsoft Online Password Reset site to request a new password from your workplace technical support team- typically the people who set up your account for you.
Important
If the password reset site doesn't work for you, contact your workplace tech support team directly.
Once you have a new password, try signing in again.
Did this solve your problem?
Are you able to sign in on another computer, or on a tablet or smartphone?
Can you sign in on a different network-for example, at home, or at a public wireless access point?
What type of devices are you using to sign in?
If you can't sign in on another network, the issue might be with the client you're using.
What type of devices are you using to sign in?
Make sure your system clock shows the correct time, and then try signing in again.
Update your computer's system time:
Windows 8
Go to a web site that shows Coordinated Universal Time (UTC).
Go to Setting > PC Settings > Time and Language.
Note your UTC offset, and compare your device's time to that shown on the website.
If you need to update your device's time:
Windows 7
Go to a web site that shows Coordinated Universal Time (UTC).
Go to Control Panel > Date and Time, and note the UTC offset for your location.
If you need to, choose Change date and time and update your computer's clock.
Try signing in again.
Did this solve your problem?
Make sure you have the most current version of the Microsoft Online Services Sign-in Assistant.
Did this solve your problem?
Make sure the user has the most current version of Skype for Business.
Did this solve your problem?
For more information, see How to troubleshoot being unable to sign in to Skype for Business.
Did this solve your problem?
Make sure your system clock shows the correct time, and then try signing in again.
Follow these steps:
Did this solve your problem?
Make sure your computer has the most recent version of Skype for Business.
Did this solve your problem?
Make sure that previously saved sign-in information isn't blocking your current sign-in attempt.
First, delete the following:
Then delete any corrupted or cached certificates:
Did this solve your problem?
Go to the app store for your device and check for updates to the currently installed version of Skype for Business.
Did this solve your problem?
Manually add Skype for Business server settings and try signing in again.
Manually add Skype for Business server settings:
Go to Skype for Business options > Personal.
Under My account, select Advanced, and then select Manual configuration.
Enter sipdir.online.lync.com:443
in both boxes, and then select OK > OK.
Sign out, and then try signing back in.
Did this solve your problem?
Manually add Skype for Business server settings, and then try signing in again.
Ask the user to follow these steps:
sipdir.online.lync.com:443
.Did this solve your problem?
We're glad to hear you're back in service.
To help your organization find out why Skype for Business can't automatically sign in, contact your workplace technical support-typically the person who sent you email about how to get set up with Office 365.
Manually add Skype for Business Online server settings, and then try signing in again.
Manually add Skype for Business server settings:
https://webdir.online.lync.com/Autodiscover/autodiscoverservice.svc/Root
Did this solve your problem?
We're sorry, but we couldn't resolve your sign-in issue. For more troubleshooting, contact your workplace technical support-typically the person who sent you email about how to get set up with Office 365.
If Skype for Business asks you for your user ID, in most cases it is the same as your sign-in address-for example, bobk@contoso.com
.
If that doesn't work, try the same credentials you use when signing in to your organization's network-for example, CONTOSObobk
.
Did this solve your problem?
Make sure you have the most current version of Skype for Business Windows Store app:
On the Start screen, tap Store
Search for Skype for Business, and install the update if one is available.
Try signing in again.
Did this solve your problem?
Make sure that previously save network information is not blocking your sign-in attempt, and then try signing in again.
Did this solve your problem?
What kind of error did you get when you tried to sign in to https://sched.lync.com?
If the Skype for Business Online manual configuration didn't work, your organization may be using Skype for Business Server.
https://webdir.example.com/Autodiscover/ autodiscoverservice.svc/Root
where example.com
is your domain name.https://webext.example.com/Autodiscover/ autodiscoverservice.svc/Root
where example.com
is your domain name.Manually add Skype for Business server settings:
contoso.com
, enter https://webdir.contoso.com/Autodiscover/autodiscoverservice.svc/Root
.https://webext.contoso.com/Autodiscover/autodiscoverservice.svc/Root
.Did this solve your problem?