Lync server 2010- Can not sign in

the client uses automatic sign in which needs DNS configuration, have you configured the required DNS settings, if not configure them or configure the client for manual sign-in from the advanced properties.

You may have a look at this tool:
http://www.insideocs.com/Tools/MOCLogin.htm

It shows at least, which DNS settings are requested and found. Not all of them are neccessary, but the client should be able to find the pool and services.

Other option as said before, set the settings manually in the client.

Hi

Now this is interesting : I have attached the snapshot
10.10.108.192   is my communicator 2007 which is running currently in my environment without any issue's and 10.10.108.111 is my lync server

Thanks
moclogin.PNG

Comunicator 2007 works a bit different than Lync 2010, nevertheless if the settings are complete, Lync can at leas connect.

The basic are:
sip.domain.tld --> A Record, IP of Frontend / Pool
 meet.domain.tld --> A Record, IP of Frontend / Pool
 dialin.domain.tld --> A Record, IP of Frontend / Pool
 _sipinternaltls._tcp.domain.tld --> pool.domain.tld (5061)

You point with _sipinternaltls to an IP, but inside the certificate, you provide a FQDN
So you may change the _sipinternaltls to the poolname and set additionally a A record, which point the pool to the IP.
http://technet.microsoft.com/en-us/library/gg398082

Which other records i do require ? I have attach some files.Please have a look
hosta-record.PNG
-tcp.PNG

Lync Client takes the first one which works.
You can see all possible settings in the moclogin

If lync is also your poolname?
Bad idea, but possible in a singel server constellation.
A redords you need for:
- the Lyncservername
- the pool name of lync (as configured in topology builder).

SRV Records
Your records, which point to your LYNC (10.10.108.111) has to be changed?
Enter the Pool FQDN, not the IP address...

What is 10.10.108.192? Your client? If yes, delete them.
You cannot have two equal service records.

If lync is also your poolname? yes please see the attachment .This is my communicator console
Bad idea, but possible in a singel server constellation. we will have only one server
A redords you need for:
- the Lyncservername
- the pool name of lync (as configured in topology builder). poolname and server name are same

SRV Records
Your records, which point to your LYNC (10.10.108.111) has to be changed? this is done
Enter the Pool FQDN, not the IP address...

What is 10.10.108.192? Your client? If yes, delete them.   this is my communicator server 2007 and all the users are currently active on this
You cannot have two equal service records.
Lync.PNG

f