Mysterious "Over you quota limits" in Exchange 2010. Any ideas on why users are getting these message if Quota has not been met?

Mysterious "Over you quota limits" in Exchange 2010. Any ideas on why users are getting these message if Quota has not been met? End users are getting over the limit errors in outlook even though the minimum level (quota) has not even been met yet. (IE Warnings for reaching 310 mb for example when the warning quota is set to 400mb).
admitechAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Thomas Zucker-ScharffSolution GuideCommented:
That is a classic phishing scheme.  Are they phishing emails or real ones?
William FulksSystems Analyst & WebmasterCommented:
How close are they to the warning level? Could be something hung up in Exchange that may be pushing it over the limit, like a large outgoing or incoming message. A screenshot of the error would help, too.
MacleanSystem EngineerCommented:
Did you make 100% sure that none of the users have a quota applied at either mailbox or mailstore level?
One usually will find that if the message is legitimate, it would be coming from the back-end exchange.
10 Tips to Protect Your Business from Ransomware

Did you know that ransomware is the most widespread, destructive malware in the world today? It accounts for 39% of all security breaches, with ransomware gangsters projected to make $11.5B in profits from online extortion by 2019.

HariomExchange ExpertsCommented:
1) First Check the Quota Limit on Exchange Database using following powershell command

Get-MailboxDatabase | fl IssueWarnningQuota,ProhibitSendQuota,ProhibitSendReceiveQuota

2) Check Mailbox Quotas Per User using following powershell command

Get-Mailbox -Identity "server_support" |fl IssueWarnningQuota,ProhibitSendQuota,ProhibitSendReceiveQuota

3) Use PowerShell to see which user has exceeds the quota limit

Get-MailboxStatistics -Database MDB01 | ? {$_.StorageLimitStatus -eq “IssueWarning” -OR $_.StorageLimitStatus -eq “ProhibitSend” -OR $_.StorageLimitStatus -eq “ProhibitSendReceive”} | Select DisplayName, Alias, StorageLimitStatus

4) Use PowerShell to see which users received a quota message:

Get-TransportServer | Get-MessageTrackingLog -ResultSize Unlimited -MessageSubject “your mailbox is” –EventID DELIVER | Select TimeStamp, Recipients, MessageSubject

Using above powershell command you will be able to find the root cause.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
admitechAuthor Commented:
apparently this was client side (outlook) issue
admitechAuthor Commented:
Didn't really identify the issue but is a PowerShell List of command to keep in the toolbox! Thanks
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Email Clients

From novice to tech pro — start learning today.