Hi

We have ECal that include EOP and EOA. Actually, we use EOP and we would like to use EOA. We have Exchange 2010 SP3 on-premises.

My question is: What is the limit for personal archive ?? We don't have any Office 365 Plan......

Found this - " By default, in Exchange 2010 SP1, the archive warning quota is set to 45 gigabytes (GB) and the archive quota is set to 50 GB. In Exchange 2010 release to manufacturing (RTM), both quotas are set to Unlimited." in this TechNet article. https://technet.microsoft.com/en-us/library/dd979795%28v=exchg.141%29.aspx?f=255&MSPPError=-2147217396 Last updated 2015-

B0ndoo7, the link you provided has to do with Exchange 2010. The OP is asking about Exchange Online archive. 

See: "2   Each subscriber receives 50 GB of storage in the primary mailbox, plus unlimited storage in the archive mailbox."

... Only on Office 365 Plan 3..

How I know if my Company has Plan 3 or Plan 2 or .......I only known that EOP and EOA are inside of Enterprise Cal...

You can get EOA outside of Plan3. Check with your reseller.

Also, see this: 

http://blogs.technet.com/b/uspartner_ts2team/archive/2015/06/15/huge-changes-to-office-365-archive.aspx

Hi,

Exchange Online Plan 1 (and E1/E2 Plans) gives users 25GB of total storage, which the user can apportion across their primary mailbox and personal archive.  Exchange Online Plan 2 (and E3/E4 Plans) gives users unlimited storage in the personal archive in addition to the 25GB of storage in the primary mailbox.

Please refer to the below article to get more useful information about Office 365 Archiving.

http://blogs.technet.com/b/uspartner_ts2team/archive/2012/12/07/office-365-archiving.aspx

Regards,

David