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Outlook 2010 with EXchange Sync FOlder has 810,000 items (!!) How do I clear

Outlook 2010 with EXchange Sync FOlder has 810,000 items (!!) How do I clear these items out?
 Trying to select all (ctrl A) is doomed.

Thanks
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hgj1357
Asked:
hgj1357
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2 Solutions
 
RoninCommented:
Please provide screenshot of the folder that you referring to, it would be easier to advise.
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Puneet BhattTech Expert/ConsultantCommented:
Do you want to delete Outlook items permanently?
Visit https://support.office.com/en-us/article/Delete-all-email-70763b76-f79b-4d03-9840-b20e5f91e393 for the steps.
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hgj1357Author Commented:
Screen shot.  We can leave this for a long time without anything positive happening.  Kinda locks up which isn't surprising when trying to display 800K+ items
Screen.jpg
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hgj1357Author Commented:
I suspect trying to move 800,000 items to deleted items will fail.  the OST is already 50GB which is what alerted us to this issue in the first place.  I think we need to permanently delete all items in one step and then compress the OST file - I just don't know how.
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RoninCommented:
User PowerShell to delete the messages on the Exchange server.
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hgj1357Author Commented:
"User PowerShell to delete the messages on the Exchange server. "  How?  And will the local OST file sync and shrink from 50GB?
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RoninCommented:
Do you have access to the Exchange server to which Outlook connects? What version is it?
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hgj1357Author Commented:
Exch 2010 on a 2012 std server. I do have access to the server
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RoninCommented:
If that the case please review the following approach.
Basically you need to validate the location of the folder in question through powershell, after assigning admin user full access permissions on the mailbox where the folder is located and execute a delete command as outlined in the example.
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hgj1357Author Commented:
What would be the search query to delete all items in the folder "sync issues" for user "AUser"
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RoninCommented:
If you're not comfortable using PowerShell, you can try MFCMAPI.
https://mfcmapi.codeplex.com/releases/view/630991
Basically this:
https://mfcmapi.codeplex.com/downloads/get/1646075

Use it to open user's mailbox and delete the items.
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hgj1357Author Commented:
MFCMAPIx86 just gives me a (not responding) message and sits there. when trying to open the 800,000 item folder
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RoninCommented:
Let it run. It should respond at some point in time.
It's safer than using PS, in your case.
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hgj1357Author Commented:
OK.  It's started populating.  This should work, even if it takes a while.
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hgj1357Author Commented:
This guy has worked for us for 6 years.  Assuming 50 hour weeks and regular vacation, this works out to a sync error every 64 seconds.
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RoninCommented:
Glad it's working for you MFCMAPI way.
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hgj1357Author Commented:
I've posted another question regarding the generation of sync error items every 12 secs.  Thanks for you help on this question.
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RoninCommented:
Welcome,
Navigate to the properties of the profile and COMPACT the OST file.
It should reduce the size.
Or uncheck cached mode, close Outlook, delete the file manually, reopen Outlook, enable Cached Mode, close and reopen Outlook.
It will re-download whatever is in the mailbox once again.
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