Friday, 26 August 2011

Lync Online: Cannot sign in because the server is temporarily unavailable

When trying to sign in to Lync Online client, you may encounter this error:
Possible reason for this error is if you have not created the DNS records required for Lync Online.
When you add and verify a domain with Office 365, you can choose what services you want to use with the domain. If you choose to run Lunc for the domain, you will need to create two SRV records in the domain's public DNS as below:
which the yourdomain.com should be replaced with the domain you have added and verified with Office 365. Adding above DNS entries will resolve the issue with Lync client.

Some registerars such as 1and1 don't let you create SRV and TXT type records in the DNS. If that is the case, you will need to configure each and every Lync client in your organization to manualy point to Lync Online servers on Office 365.

To do so, open Lync and go to Lync Options:
Click on Advanced button next Sign in Address in the Personal pane:


In the Advanced Connection Settings, change the coniguration setting to manual and change both Internal and External server names to sip.online.lync.com:443. confirm changes and restart Lync.

13 comments:

  1. thanks Amin - very useful information for us. We use 1and1 and it is a bit of a limitation.

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  2. Just download the hotfix provided by Microsoft for Lync.Check out the links below.Download the patch according to your system type

    32 bit: http://www.microsoft.com/en-in/download/details.aspx?id=25055

    64 bit: http://www.microsoft.com/en-in/download/details.aspx?id=14490

    ReplyDelete
  3. Hello there,
    i cannot sign in to lync, i get error message lync cannot connect because the server is temporary unvailable.
    I did every you advised, still does not works.
    Regards,

    Fabrice

    ReplyDelete
  4. Check out this KB:
    http://support.microsoft.com/kb/2541980

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  5. We resolved this by adding the CNAME and _sip SRV entries on the local Active Directory DNS as well.

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  6. im having the same problem how do i do the CNAME and _sip SRV entries on the local Active Directory DNS as well.

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  7. Thanks it is working as per your instruction, I have added dir with sip in the command line see the 2nd line.

    sip.online.lync.com:443
    sipdir.online.lync.com:443

    ReplyDelete
  8. mohon bantuannya rekan saya istall aplikasi ms Office communicator teatpi tidak bisa dengan keterangan cannot sign in because the server temporarily unavailable, mohon bantuan solusinya teman-teman

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  9. i have Lync 2013 and have same problem i tried to make Internal and External server names to sip.online.lync.com:443. confirm changes and restart Lync. and still have same problem ....

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  10. The same problem! And since Friday, 26 August 2011!!!!
    MS!, Are you nuts?

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  11. Lionberg, update below SIP configuration manually in SIP for internal & external

    sip.online.lync.com:443
    sipdir.online.lync.com:443

    Thank you,
    Jagdeep Gill

    ReplyDelete
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