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So if my back end servers, my Hub, CAS, etc. go out, does the Edge Transport Server role buffer my email until the others come back online? Thanks.

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up vote 4 down vote accepted

It does hold on to the mail. There are internal queues that you can look at if you dig enough. I believe they're in the Extra Tools sections. I don't have the management console in front of me so don't know for certain. The queues are in there right next to the backed up outbound queues.

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Yep - Tools->Queue Viewer. (at least that's where it is in '07. I assume it's the same in '10). – EEAA Jul 29 '11 at 0:48

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