Several Outlook 2010 users with Exchange 2010 mailboxes reported the following issues. When creating a new message and adding a Universal distribution list to the To: field, they attempt to expand the membership of the DL and they get an “Cannot perform the requested operation. The command selected is not valid for the recipient. The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action.” error message. In addition, if they tried to look at the ......
Recently, my Active Directory user account was getting locked out on a regular basis after changing my user account password. In our environment, the most two common causes for Active Directory user account lockouts are disconnected RDP sessions or an invalid password on a mobile device configured for Exchange ActiveSync access. I used the LockoutStatus.exe Tool to search for one or more disconnected RDP sessions using my old password but I was not able to find anything. So, the next thing I checked ......
Recently, several enabled Remote call control (RCC) users reported that they were having issues making phone calls from Communicator. When they attempted to call a number, they got a “Cannot locate <user>” error message and when they clicked on Retry, they got another error message, “There may be an error in the address. Check the address and then try again.” After some troubleshooting, we found out our CSTA Gateway server was using an expired certificate. For communication to take place, the ......