I installed Exchange 2013 into our existing Exchange 2010 environment. I have moved 2 mailboxes (one of them mine) from Exchange 2010 to one of the Exchange 2013 databases. The mail seems to be flowing properly.
I do not seem to be able to perform mailbox administration in Exchange 2013. I am trying to grant another user ID "send as" permission to my mailbox. I can select the user ID, but when I click "Save" I get the message: "Active Directory operation failed on DC1.mycorp.com. This error is not retriable. Additional information: Access is denied. Active directory response: 00000005: SecErr: DSID-031521D0, problem 4003 (INSUFF_ACCESS_RIGHTS), data 0."
I verified that I am a member of the Organization Management role group as well as being a member of the Exchange Organization Administrators security group. I am a member of all Exchange and Domain administrative groups except Schema Admins. I can still perform full administration within Exchange 2010.
I also tried logging in as the administrative userID I used when installing Exchange 2013, but got the same results.
Any idea why I am unable to manage mailboxes in Exchange 2013?
Thank you very much for your help.
