Exchange Store Limit

Riaz Alexander Ansary
Riaz Alexander Ansary used Ask the Experts™
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guys,
is the Exchange Store Limits different when using outlook application downloaded from o365 subscription? i know its a odd question but we have this situation right now. couple of users who got the  new outlook app from their O365 account, all of a sudden gets error when sending emails:

"This message could not be sent. Your server administrator has limited the number of items you can open simultaneously. Try closing messages you have opened or removing attachments and images from unsent messages you are composing. Try sending the message again later, or contact your network administrator."

all mailboxes are on Prem exchange 2016. no one else has the issue.
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Most Valuable Expert 2015
Distinguished Expert 2018

Commented:
There are indeed different store and throttle limtis in O365, and we cannot customize those. However, none of that depends on the client, so using a newer Outlook version will not cause this.
Riaz Alexander AnsaryEnterprise Infrastructure Systems Engineer

Author

Commented:
this is why the issue is odd for me becasue when this same users uses outlook 2016 he is fine but when uses the outlook installed from o365  he keeps getting that message and cant send emails to everyone as it gives
This message could not be sent. Your server administrator has limited the number of items you can open simultaneously

so I am not sure what else can it be. I dont want to go ahead and change the store limit on each exchange server and increase the limit.
Most Valuable Expert 2015
Distinguished Expert 2018

Commented:
Try running Outlook in safe mode, or recreate the profile.
Senior Systems Admin
Top Expert 2010
Commented:
This message could not be sent. Your server administrator has limited the number of items you can open simultaneously
Is not related to store size. It's a count of the number of open objects. Add-ins may be responsible, in which case safemode should help. If it does, disable add-ins til you determine the problematic one.
Riaz Alexander AnsaryEnterprise Infrastructure Systems Engineer

Author

Commented:
thanks guys it is the add on

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