Exchange 2013 (on prem) how to cancel meetings for deleted user (AD deleted and Exchange)

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Denes, Laszlo

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Mar 22, 2021, 9:12:27 AM3/22/21
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Hi Everyone and many thanks in advance as I am stumped.

We had a user who left 2 months ago which is past the auto retention period for soft deletes on Exchange.

We eventually deleted (as per policy) the user account from AD and Exchange (an export of mailbox was done for content), but for some odd reason other users still have recurring calendar meeting entries set by the deleted user and nobody can delete them to recapture that time.

The problem is that AD account and Exchange mailbox are gone and not showing up under deleted users (in Exchange) so there is nothing to attach to so I can cancel those meetings.

Tried some PS commands but no luck so far.

Would greatly appreciate any help.

 

Laszlo Denes

Technical Analyst Servers

Information Systems

The Salvation Army Toronto Grace Health Centre

650 Church Street, Toronto, ON M4Y 2G5

t: 416-925-2251 ext. 214

f: 416-925-3211

lde...@torontograce.org

www.torontograce.org

 

cid:image004.png@01D3936C.4940F060 cid:image006.png@01D3936C.4940F060 cid:image008.png@01D3936C.4940F060

 

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Michael B. Smith

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Mar 22, 2021, 9:35:17 AM3/22/21
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Remove-CalendarEvents is the cmdlet for this, but it operates against a mailbox.

 

I honestly don’t know what to do if the mailbox has already been purged.

 

From: ntexc...@googlegroups.com <ntexc...@googlegroups.com> On Behalf Of Denes, Laszlo
Sent: Monday, March 22, 2021 9:12 AM
To: ntexc...@googlegroups.com
Subject: [ntexchange] Exchange 2013 (on prem) how to cancel meetings for deleted user (AD deleted and Exchange)

 

Hi Everyone and many thanks in advance as I am stumped.

We had a user who left 2 months ago which is past the auto retention period for soft deletes on Exchange.

We eventually deleted (as per policy) the user account from AD and Exchange (an export of mailbox was done for content), but for some odd reason other users still have recurring calendar meeting entries set by the deleted user and nobody can delete them to recapture that time.

The problem is that AD account and Exchange mailbox are gone and not showing up under deleted users (in Exchange) so there is nothing to attach to so I can cancel those meetings.

Tried some PS commands but no luck so far.

Would greatly appreciate any help.

 

Laszlo Denes

Technical Analyst Servers

Information Systems

The Salvation Army Toronto Grace Health Centre

650 Church Street, Toronto, ON M4Y 2G5

t: 416-925-2251 ext. 214

f: 416-925-3211

lde...@torontograce.org

www.torontograce.org

 

  

 

________________________________________
NOTICE: This message, including any attachments, may contain privileged or confidential information and is intended for use only by the individual to whom it is specifically addressed (or those responsible for the delivery of the message to such person). Any distribution, copying or disclosure is strictly prohibited without the written consent of the sender. If you are not the intended recipient or have received this message in error, please notify us by reply email and permanently delete the original transmission from us. Thank you for your cooperation. If you have any questions about this message please contact the Information Systems Department, Salvation Army Toronto Grace Health Centre, 650 Church St., Toronto, ON M4Y 2G5. Phone: (416) 925-2251

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Denes, Laszlo

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Mar 22, 2021, 9:52:36 AM3/22/21
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Cheers Michael…

I don’t understand why an old meeting request series made by this user would still show up if AD account and Exchange account are deleted.

Yeah I would have to restore AD and Exchange accounts which is a huge effort for this…

 

Laszlo Denes

Technical Analyst Servers

Information Systems

 

From: ntexc...@googlegroups.com [mailto:ntexc...@googlegroups.com] On Behalf Of Michael B. Smith
Sent: Monday, March 22, 2021 9:35 AM
To: ntexc...@googlegroups.com

Subject: [ntexchange] RE: Exchange 2013 (on prem) how to cancel meetings for deleted user (AD deleted and Exchange)

 

CAUTION: External mail. Do not open attachments or click links that you do not trust.

Michael B. Smith

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Mar 22, 2021, 10:24:22 AM3/22/21
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Meeting requests are stored in user’s mailboxes – not just the creator but all attendees. Deleting the user doesn’t delete all those meetings.

 

(There is a reason for this – imagine an admin assistant that creates lots of standing meetings and then leaves the company. Should those meetings be deleted? Almost certainly not…)

Jim Kennedy

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Mar 22, 2021, 10:26:12 AM3/22/21
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What about an org wide mailbox search for kind:meetings from the deleted user? But how would the deleted user show on the invite now that they are gone?

Michael B. Smith

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Mar 22, 2021, 11:01:15 AM3/22/21
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I think the displayName is stored in the mailbox calendar along with the SID. Good idea, it might work.

Denes, Laszlo

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Mar 22, 2021, 2:47:38 PM3/22/21
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Is there no way to force take over ownership of that meeting somehow?

 

Laszlo Denes

Technical Analyst Servers

Information Systems

 

From: ntexc...@googlegroups.com [mailto:ntexc...@googlegroups.com] On Behalf Of Michael B. Smith
Sent: Monday, March 22, 2021 11:01 AM
To: ntexc...@googlegroups.com
Subject: [ntexchange] RE: Exchange 2013 (on prem) how to cancel meetings for deleted user (AD deleted and Exchange)

 

CAUTION: External mail. Do not open attachments or click links that you do not trust.

I think the displayName is stored in the mailbox calendar along with the SID. Good idea, it might work.

Michael B. Smith

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Mar 22, 2021, 3:03:42 PM3/22/21
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No. It has to be re-created.

Denes, Laszlo

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Mar 23, 2021, 7:27:44 AM3/23/21
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HUGE OUCH… hahaha…

So basically a restore of the account in AD and then a restore of the account on Exchange from backups… right?!?! LOL!

 

 

Laszlo Denes

Technical Analyst Servers

Information Systems

t: ext. 214

lde...@torontograce.org

 

From: ntexc...@googlegroups.com [mailto:ntexc...@googlegroups.com] On Behalf Of Michael B. Smith
Sent: Monday, March 22, 2021 3:04 PM
To: ntexc...@googlegroups.com
Subject: [ntexchange] RE: Exchange 2013 (on prem) how to cancel meetings for deleted user (AD deleted and Exchange)

 

CAUTION: External mail. Do not open attachments or click links that you do not trust.

Michael B. Smith

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Mar 23, 2021, 8:21:39 AM3/23/21
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You should be able to mount the database as a recovery database on Exchange and then restore it to any account. (Although naming it the same thing would allow Exchange to soft-match it for you.) No AD account recovery is required.

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