Hi, I have a mailbox in exchange 2007 which i set unlimited size for some reasons.I set the unlimited size limit 6 months ago.Two days ago i was notified that non-delivery reports (The recipient's mailbox is full and can't accept messages now) getting generated when mails are sent to this mailbox.I double checked the limit and it is unlimited.I checked the store limit (which was set 1 year ago) and the current size of the mailbox.Surprisingly, this seems to be occuring when the mailbox size is crossing the store limits.I have another mailbox in different store which exhibited the same issue.I am unsure why the individual limits are not getting applied.We did not make any change on our exchange server recently.All this individual and store limits were set long time ago and server was rebooted multiple times after that.I checked the limits in EMS and it shows unlimited.Can someone help me to find the root cause of this issue? I may be able to resolve individual issues by moving the mailbox to a different server or setting a higher limit other than "Unlimited" but i would really like to know what is happening here. Thank you

Set-Mailbox -Identity Mailbox_Name -UseDatabaseQuotaDefaults:$False -- Ed Crowley MVP "There are seldom good technological solutions to behavioral problems." . "RMN77" wrote in message news:855306fc-078b-411d-8149-731741ac490a... Hi, I have a mailbox in exchange 2007 which i set unlimited size for some reasons.I set the unlimited size limit 6 months ago.Two days ago i was notified that non-delivery reports (The recipient's mailbox is full and can't accept messages now) getting generated when mails are sent to this mailbox.I double checked the limit and it is unlimited.I checked the store limit (which was set 1 year ago) and the current size of the mailbox.Surprisingly, this seems to be occuring when the mailbox size is crossing the store limits.I have another mailbox in different store which exhibited the same issue.I am unsure why the individual limits are not getting applied.We did not make any change on our exchange server recently.All this individual and store limits were set long time ago and server was rebooted multiple times after that.I checked the limits in EMS and it shows unlimited.Can someone help me to find the root cause of this issue? I may be able to resolve individual issues by moving the mailbox to a different server or setting a higher limit other than "Unlimited" but i would really like to know what is happening here. Thank you Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

That is the step i took for one of the mailbox.Any idea why that attribute ( UseDatabaseQuotaDefaults) was not set for a mailbox with unlimited size? What should be done to avoid this situation as there may be requirements in the future to set mailbox size limit to unlimited? is this a bug already accepted by Microsoft?

I believe Microsoft will say that it's by design. That value says to not use the store defaults. Apparently setting a limit in PowerShell doesn't set this. When you use the EMC you have to first uncheck the box that says to use the store defaults, then you fill in the values because the GUI does it that way. In PowerShell, you have to do the same thing, but you can do it in the same command. Always set that attribute to $False at the same time you set a limit. -- Ed Crowley MVP "There are seldom good technological solutions to behavioral problems." . "RMN77" wrote in message news:ed6d8545-8f29-4f1c-81a8-025993cf4fad... That is the step i took for one of the mailbox.Any idea why that attribute ( UseDatabaseQuotaDefaults) was not set for a mailbox with unlimited size? What should be done to avoid this situation as there may be requirements in the future to set mailbox size limit to unlimited? is this a bug already accepted by Microsoft?Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

On a mailbox which has unlimited size, i set the value of usedatabasequotadefaults to false but when i checked on the next day, the value became null. Before setting the value ProhibitSendQuota : unlimited ProhibitSendReceiveQuota : unlimited UseDatabaseQuotaDefaults : True IssueWarningQuota : unlimited RulesQuota : 64KB After setting the value ProhibitSendQuota : unlimited ProhibitSendReceiveQuota : unlimited UseDatabaseQuotaDefaults : False IssueWarningQuota : unlimited RulesQuota : 64KB After 24 hours ProhibitSendQuota : unlimited ProhibitSendReceiveQuota : unlimited UseDatabaseQuotaDefaults : IssueWarningQuota : unlimited RulesQuota : 64KB

Issue resolved.We could find out an automated process which had a flaw in logic to make the usedatabasequotadefaults to blank if the value of usedatabsedquotadefaults is False and the size limits are set to unlimited.Changed the logic and now everything OK.