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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(128, 8%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
8:09:37 Synchronizer Version 16.0.14527
8:09:37 Synchronizing Mailbox 'XXXX'
8:09:37 Synchronizing Hierarchy
8:09:37 Synchronizing server changes in folder 'Contacts'
8:09:37 Downloading from server 'https://outlook.office365.com/mapi/emsmdb/?MailboxIDXXXX'
8:09:38 Synchronizing server changes in folder 'Drafts'
8:09:38 Downloading from server 'https://outlook.office365.com/mapi/emsmdb/?MailboxId=XXXX'
8:09:38 Synchronizing server changes in folder 'PersonMetadata'
8:09:38 Downloading from server 'https://outlook.office365.com/mapi/emsmdb/?MailboxId=XXXX'
8:09:38 1 item(s) added to offline folder
8:09:38 Synchronizing server changes in folder 'Recipient Cache'
8:09:38 Downloading from server 'https://outlook.office365.com/mapi/emsmdb/?MailboxId=XXXX
8:09:39 1 item(s) added to offline folder
8:09:39 Synchronizing server changes in folder 'Deleted Items'
8:09:39 Downloading from server 'https://outlook.office365.com/mapi/emsmdb/?MailboxId=XXXX'
8:09:39 6 item(s) changed read-state in offline folder
8:09:39 Synchronizing local changes in folder 'XXXXFax'
8:09:39 Uploading to server 'https://outlook.office365.com/mapi/emsmdb/?MailboxId=XXXX'
8:09:43 5 item(s) updated in online folder
8:09:43 Error synchronizing folder
8:09:43 [XXXXXXXXX]
8:09:43 The client operation failed.
8:09:43 Microsoft Exchange Information Store
8:09:43 For more information on this failure, click the URL below:
8:09:43 https://www.microsoft.com/support/prodredirect/outlook2000_us.asp?err=80004005-501-80004005-230
8:09:43 Synchronizing Views
8:09:43 Downloading from server 'https://outlook.office365.com/mapi/emsmdb/?MailboxId=XXXX'
8:09:43 Downloading from server 'https://outlook.office365.com/mapi/emsmdb/?MailboxId=XXXX3'
8:09:44 Done
How do I fix this?
Using Classic Outlook on Windows for personal email, calendar, and contact management
Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
I was having similar issues, and I found a fix that works for my situation.
yep, false alarm. Worked for about 8ish hours, now all users are back to having issues again.
Hi All,
Thank you for reporting. Regarding the issue, we will do some research on our side to see if we can find any related information about this. Once we receive any update from the team, we will get back to you.
Your patience and understanding are highly appreciated.
Best regards,
Shyamal
Same Problem here. Outlook is 2109 Build 16.0.14430.20154 in 32 Bit. Synchronizer Version 16.0.14430.
I saw this Problem first on January 3rd.
After some testing it must be outlook related. Once I upgraded to latest version the error immediately occured.
Unfortunately downgrading back to the previous version does not fix the error like already mentioned by C.Gellermann.
Exact same issue here.
First noticed January 3rd around 09:00 am. Running on Outlook 2102 (Build 13801.21092 CTR) - Synchronizer Version 16.0.13801
Readding favorites solves issue for a single sync, same when recreate mail profile.
Does NOT happen on a fresh installed PC with older Versions :
Win 10 1909, December patches NOT installed, Outlook Version 2008 (Build 13127.21624 CTR)
Which AV scanner do you all have ?