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Hi. thank you for this, but this article only applies to exchange 2013. I am currently working on exchange 2010.
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If it's failed you have to reseed<br />
Read this for details<br />
<a href="http://exchangeserverpro.com/how-to-reseed-a-failed-mailbox-database-copy-in-exchange-server-2010/" rel="ugc">http://exchangeserverpro.com/how-to-reseed-a-failed-mailbox-database-copy-in-exchange-server-2010/</a>
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Hello Experts, <br />
<br />
At my work we currently have a very slow network connection at one of our remote locations. unfortunately our passive server with 4 passive data bases also resides in this location. the slow connection has not effected exchange, but it is effecting other applications. so to save on the replication bandwidth that is currently going to this location i am thinking of disabling the passive copies of the databases, and scheduling them after hours, or maybe in the afternoon. my question is, if the 4 passive copies are suspended will the 4 active databases still truncate the transaction logs after each backup? when i re-activate the 4 passive copies, will they automatically get updated, or will i have to reseed each database. please let me know. thank you
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Hello Experts, 

At my work we currently have a very slow network connection at one of our remote locations. unfortunately our passive server with 4 passive data bases also resides in this location. the slow connection has not effected exchange, but it is effecting other applications. so to save on the replication bandwidth that is currently going to this location i am thinking of disabling the passive copies of the databases, and scheduling them after hours, or maybe in the afternoon. my question is, if the 4 passive copies are suspended will the 4 active databases still truncate the transaction logs after each backup? when i re-activate the 4 passive copies, will they automatically get updated, or will i have to reseed each database. please let me know. thank you

exchange 2010 suspending passibe DB copies to save bandwidth on slow network connection.

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.