I just set up Lync Server 2010 for the first time. When trying to add my administrator account to Lync I get the following error:
Active Directory operations failed on <Server Name>. You cannot retry this operation: “Insufficient access rights to perform the operation.
After doing some hunting this is apparently a known issue with administrator accounts but there is a workaround.
Turn Advanced Features on in AD Users and Computers, locate the user that is not working, select the security tab, click advanced and select “Include Inheritable Permissions from this object’s parent” on the user object you then be able to add them to the Lync Server.