Then, check the DNS configuration for EWS Connectivity To check this setting, open Lync, click the gear icon, and then click Personal. Make sure that the Personal information manager is set to Microsoft Exchange or Microsoft Outlook in Lync. Then, check the Personal Information Manager If the mailbox is inaccessible, you should see Exchange connection Down next to UCS Connectivity State. Press and hold the Ctrl key, and then right-click the Lync icon in the notification area.
Solutioin If you're experiencing this issueĬheck the Lync Configuration Information screen. If this becomes an issue, you may want to migrate your contacts back to Skype for Business Online. If their mailbox is unavailable through Exchange Web Services (EWS) at any time, they won't be able to change or even access their contact lists. However, some users might still be using the Exchange UCS and experience no issues or problems at all. Since then, this feature was disabled because by default, and Skype for Business Online contact lists are now managed by Skype for Business Online. This is known as the Unified Contact Store (UCS), and when a user's Exchange mailbox becomes unavailable, Lync can no longer take advantage of UCS to add, remove, or change the Lync contact list. When Office 365 was upgraded in 2013, Exchange Online was configured to store Skype for Business Online users' contacts and photos as part of their Exchange mailbox. +CategoryInfo: InvalidArgument: (:MailboxOrMailUserIdParameter), UnableToMoveUCS…nlevelException If you must migrate the mailbox despite the potential data loss, you can do so by running 'Set-UMMailbox mailboxID -ImListMigrationCompleted $false'.
After this has been done, you should be able to complete this migration. To continue, please contact your Instant Messaging administrator and make sure that the user's contact list is moved back to the Instant Messaging server. The Exchange copy might be the only copy of the user's contact list. If you do, the user could permanently lose access to their Instant Messaging contact list, which will cause serious data loss. If the user had a contact photo associated with the Exchange mailbox, the photo is now unavailable to other contacts.Īdditionally, if you try to move an Exchange 2013 mailbox to an Exchange 2010 mailbox on-premises, you'll receive the following warning message: You shouldn't migrate mailbox to Exchange 2010 or an earlier version while the user's Instant Messaging contact list is stored in Exchange. When you try to add, remove, or change contacts or groups in the user's contact list in this situation, the user receives the following error message: Cannot add, remove, or move contacts or groups at this time. Skype for Business Online (formerly Lync Online) users may notice that their contact list is empty or read-only after their Exchange mailbox becomes unavailable or is disconnected, unlicensed, or moved to Exchange 2007 or Exchange 2010.