Hi, Not sure if this would be the correct place for this, but here is my issue We have a client with Exchange 2010, and Outlook 2010 and they seem to be getting sync issues. the error that comes up is 10:58:52 Synchronizer Version 14.0.6117 10:58:52 Synchronizing Mailbox "User Mailbox" 10:58:52 Synchronizing local changes in folder 'Inbox' 10:58:52 Uploading to server "server.domain" 10:58:52 Synchronization of some deletions failed. 10:58:52 [0-130] 10:58:52 2 item(s) deleted in online folder 10:58:52 Done And here is another example 10:27:20 Synchronizer Version 14.0.6117 10:27:20 Synchronizing Mailbox "User Mailbox" 10:27:20 Synchronizing Hierarchy 10:27:20 Synchronizing local changes in folder 'move folder' 10:27:20 Uploading to server "Server.domain" 10:27:20 Synchronization of some deletions failed. 10:27:20 [0-130] 10:27:21 3 item(s) added to online folder 10:27:21 3 item(s) deleted in online folder 10:27:21 Synchronizing local changes in folder 'move folder 2' 10:27:21 Uploading to server "Server.domain" 10:27:21 4 item(s) added to online folder 10:27:21 Downloading from server "Server.domain" 10:27:21 Done 10:27:25 Microsoft Exchange offline address book 10:27:25 Download successful Now I have tried some of the standard troubleshooting steps but it seems to keep happening. This is what I have tried 1) turned off any 3rd part addins 2) turned on outlook logging, but it does not seem to indicate any errors, or I may not be reading it right 3) removed the ost file, and let outlook recreate it 4) turned off cache mode, and turned off offline file, re-open outlook turned back on offline file, cache mode 5) removed exchange support files for outlook, and repaired office So I am not sure where to proceed from here. Thanks Tim

Hi Tim, Does this issue occur to all the users? I suggest we do not open with the Outlook. Please only have a test to log on OWA and see if the sync error log persists. If the issue still persists in OWA, I suspect there are corruptions in the mailbox. Thanks, Simon Wu Exchange Forum Support Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com

Hi Tim, Does this issue occur to all the users? I suggest we do not open with the Outlook. Please only have a test to log on OWA and see if the sync error log persists. If the issue still persists in OWA, I suspect there are corruptions in the mailbox. Thanks, Simon Wu Exchange Forum Support Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com

Hi Simon, Ok I will look into that to see what happens. Tim

Hello Tim, Is there any new update on this thread? Thanks, Simon Exchange Forum Support Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com