What are the ramifications of going over the public folder mailbox size limit of 100GB in Exchange 2013?

Exchange 2013 lists public folder limits of 100GB for the mailbox size.  

What are the ramifications of going over this?
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FinServCoAsked:
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Alex GreenProject Systems EngineerCommented:
You blow the database into little bits and then you use ESEUTIL to fix it.
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Alex GreenProject Systems EngineerCommented:
More importantly, what are you storing in there??!?!?!!?!?!

I'd go through and strip out all attachments and go from there, get sharepoint and move it over.
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FinServCoAuthor Commented:
Okay.  I've got two public folder mailboxes and they're both over the 100GB limit and still appear to be fine.  I'm wondering if that limit is just the default limit or a hard limit.  

It doesn't seem to have blown the database into little bits.
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FinServCoAuthor Commented:
Unfortunately I don't have the option of stripping off attachments nor going to sharepoint.  If I have to, I can split the public folder mailboxes up more, if it really will become an issue.  I haven't found anything saying what happens if you go over the limit.  

The public folders are used heavily by several departments.
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AmitIT ArchitectCommented:
just change the quota limit. As far as I know, it can go upto 2TB. As it is now mailbox in Exchange 2013, that's why 100 GB is set.
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Saif ShaikhServer engineer Commented:
You can split the public folder mailboxes i,e. primary hierarchy and multiple secondary hierarchy.

Primary hierarchy will have the writable copy of items and folders and secondary hierarchy will have read-only copy of data.
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Michael B. SmithManaging ConsultantCommented:
The ramification is "poor performance" and "longer backup/restore" in emergency. I'd recommend you split your hierarchy into something a bit more manageable (i.e., each piece smaller in size).
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Saif ShaikhServer engineer Commented:
I would recommend using a shared mailbox and provide full access to users. You can export the public folders in PST and import them in shared mailbox.

Create a new Shared Mailbox(es).
Give yourself Full Access to the mailbox.
Open Outlook from a virtual machine or utility server, running from the same physical location (from within the same datacenter in the same network) as the Exchange server (things will transfer faster).
Copy your Public Folder(s) to as many shared mailboxes as you need to.

By doing this you will not have any performance issue since it a mailbox and also you can always keep a tap on the mailbox size and compress and remove old unwanted items and always keep the mailbox under size limit.

Also restoring will help because it will be a mailbox, I mean even public folder is a mailbox now but I was thinking on the performance factor once it reaches it's default limit. Also Shared mailbox does not need a license in O365.

You may refer below article on the pros and not cons of migrating PF data to a shared mailbox.
https://www.exchangesavvy.com/migrate-public-folders-office-365-shared-mailbox/
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Michael B. SmithManaging ConsultantCommented:
No.

A shared mailbox larger than 50 GB DOES require a license in O365. But why do you bring O365 into this at all? The company is on-premises and states they heavily use public folders.

And you lose SIGNIFICANT functionality converting from a public folder to a shared mailbox.

There is no performance difference between a public folder mailbox and any other mailbox.
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Saif ShaikhServer engineer Commented:
Ya sure I was under impression that he is using Office 365..
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FinServCoAuthor Commented:
Thanks.  I'll look to split them up.
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