Situation
Lync MAPI ask for credentials
 |
| Microsoft Lync 2010 MAPI COM Server (Credentials Screen) |
Environment
Windows 7 Enterprise 64-bit Client in a corporate Network (Windows 2008 R2 Domain Controller)
Microsoft Office Professional Plus 2010 (Outlook) Version 14.0.5128.5000 64-bit
Lync 2010 64-bit Client Version 4.0.7577.0
Investigation
I remember using Credential Manager when Outlook 2007 start asking for credentials, the solution to that was to delete the entry for Outlook in Credential Manager and open Outlook to restore the entry with the right values; I research a little bit more on this and found this post where Allen Song propose the * before domain name, that took care of all Credential issues (Outlook, Communicator MAPI -this was because of a 32 to 64 bit arquitectural difference- and Lync MAPI)
Solution
Go to Credential Manager
Add entry:
Log on to: *.domainname (such as *.microsoft.com)
Username: domain\username
Password: password
Source:
http://social.technet.microsoft.com/Forums/en/exchangesvrclients/thread/e3e5b9cd-cdce-45ce-a6a6-eafc5011032a
