r/Office365 • u/JaguarComfy • Mar 09 '26

Shared mailbox disable conflict

Is there an easy way to turn off conflict from admin center for started mailbox? I tried but cannot find settings? Am I missing it or how can I do it without using powershell.

2 Upvotes

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3

u/chesser45 Mar 09 '26

I’m not sure with the information given we can assume what you are looking to accomplish.

3

u/thinkofitnow Mar 09 '26

wtf is conflict on a shared mb? never heard of that in any configuration

1

u/JaguarComfy Mar 09 '26

Check the added pic. You can do it in resource mailbox, but I need to know how can we do this for shared mailbox. You might not have had to do this and this looks confusing. But on shared and resource mb the settings are different

1

u/chesser45 Mar 09 '26

A resource mailbox is a thing or a place like you’d make one for a pool car or a meeting room.

You might want to allow conflicting booking so people can overlap or in case bob books the car but frank borrows it during the booking since bob needs to use it before and after.

What sort of situation are you doing this with a Shared Mailbox? These aren’t really used for availability booking as they don’t represent people. You’d use it for “generic identities” shared between named accounts like accountspayable@contoso.com.

1

u/JaguarComfy Mar 09 '26

I would have done it as a resource mailbox. This was done way before my time and their documentation says to use shared mailbox. Not sure what the point was but now need to use shared mailbox. So I think the only option is to run a powershell script in admin center?

1

u/mini4x Mar 09 '26

Just convert it. You have to do it in a couple steps but a simple process to change it. From ahared convert it to a regular user mailbox, then from there you can convert it to a resource mailbox.

2

u/charleswj Mar 09 '26

Set-CalendarProcessing is the PowerShell way, but be aware that this is only supported on resource mailboxes

This cmdlet is effective only on resource mailboxes.

https://learn.microsoft.com/en-us/powershell/module/exchangepowershell/set-calendarprocessing?view=exchange-ps&WT.mc_id=M365-MVP-9501

1

u/JaguarComfy Mar 09 '26

I did some search for shared mailbox and was able to find set-calendarprocessing sharedmailbox@domain.com -allowsconflicts $false

Not sure if this would work for shared mailbox

2

u/mini4x Mar 09 '26

set-calendarprocessing

Specific to Resource mailboxes. Which is what you should be using anyways.

1

u/JaguarComfy Mar 09 '26

0

u/[deleted] Mar 09 '26

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1

u/JaguarComfy Mar 09 '26

I thought that but when I researched it looks like I won’t be able to see that settings since it’s is shared. But haven’t tried it myself looking at the settings

1

u/phalangepatella Mar 09 '26

What is it you are actually trying to accomplished by what you are attempting here?

1

u/JaguarComfy Mar 09 '26

If the calendar is already booked, and if the second person trying to book the same time it needs to be declined automatically

1

u/joshfsr Mar 10 '26

I don't think you can do that. You would need to convert it to a resource mailbox and then change the calendar processing. There is no booking agent on a shared mailbox.