Hi,

I've just finished a standard installation and trying to create a user. Unfortunately an error pops up stating 

Specified SIP Domain is Not Valid . Specify a valid SIP Domain and try again

Please advice as to whether did i missed any step? 

I created an A record lync.abc.com in DNS

I check on get-CsDomain and got a reply

lync.abc.com [True]

I've gone through the link below but doubt is addressing the same problem i'm experiencing

http://social.technet.microsoft.com/Forums/en-US/ocsmanagement/thread/fb55de6a-dca7-47bf-b994-c664ad46330b

Do note that this is the first user i'm creating .

Steps to create would be a great help! Many Thanks

What is the primary SIP domain that you defined in Lync Topology Builder? This is typically the same as the SMTP email address or matches the internal AD DNS suffix by default e.g. domain.net. You can use Lync Control Panel or PowerShell directly to create a user. For the former, make sure that Silverlight 4 is installed on the administrative machine. Do not forget to add the Lync adminstrator account to the CSAdministrator security group, logout and relogin first.

Please share with us if this helps. Thanks.

Under the default SIP Domain i've specified 

lync.corp.abc.com  

"This is typically the same as the SMTP email address" Do you mean that the SIP Domain must be the the current smtp domain? 

My current smtp is mail.abc.com. 

So should i replace lync.corp.abc.com to mail.abc.com?

I've confirmed installed silverlight and CSAdministrator security group is already done.

I've managed to resolved it realising that the SIP domain is actually requesting for the domain name within the organisation which was my abc.com

Amended it and it works! pheww...

• Marked as answer by Sean_XiaoMicrosoft community contributor, Moderator Tuesday, June 19, 2012 8:06 AM

I've managed to resolved it realising that the SIP domain is actually requesting for the domain name within the organisation which was my abc.com

Amended it and it works! pheww...

• Marked as answer by Sean_XiaoMicrosoft community contributor, Moderator Tuesday, June 19, 2012 8:06 AM

Hi,

The Lync SIP domain can be different from Exchange SMTP address and domain name. Normally we always make the domain name as the primary domain, but you can create mulitiple other sip domains as the additional sip domain.

Best practice would be to match it to the SMTP Domain name... You don't have to do it this way, but I think it makes more sense.

EG: If an email address of a user is  john.smith@domainname.com, then it would make sense to use just 'domainname.com'; ie: don't use lync.domainname.com, www.domainname.com or mail.domainname.com - just use domainname.com.

Regards,

Damien

• Proposed as answer by Damien Sugden Tuesday, June 19, 2012 4:24 AM
• Marked as answer by Sean_XiaoMicrosoft community contributor, Moderator Tuesday, June 19, 2012 8:06 AM

Best practice would be to match it to the SMTP Domain name... You don't have to do it this way, but I think it makes more sense.

EG: If an email address of a user is  john.smith@domainname.com, then it would make sense to use just 'domainname.com'; ie: don't use lync.domainname.com, www.domainname.com or mail.domainname.com - just use domainname.com.

Regards,

Damien

• Proposed as answer by Damien Sugden Tuesday, June 19, 2012 4:24 AM
• Marked as answer by Sean_XiaoMicrosoft community contributor, Moderator Tuesday, June 19, 2012 8:06 AM

I am having the same problem Nad77..

Can you help me out with more details?

Can anyone post a solution please? I've tried a cmdlet DisableEmailComparisonCheck but no success

ta