After rebooting one of the cas array servers blackbarry stops working

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boris.ra

I just added 4 servers to existing exchange 2003 environment , I have 2 cas servers on vm and 2 database servers in the dag . I migrated blackberry account to exchange 2010 . As soon as I rebooted cas1 server blackberry users cant receive emails . If I reboot cas2 after that they start receiving mail . I moved account back to 2003 , but now the same as soon as i reboot cas1 , all 2010 users don't get email , 2003 are ok . I am pooling my hair , what could it be . I did properly moved blackberry , disabled proper things in thoughteling policy . Any idea ?
 
E

Ed Crowley [MVP]

In Exchange 2010, all mailbox access goes through a CAS server. If your CAS array is not load-balanced, then BES will be pointed to one CAS, and if you reboot that CAS, access will be broken. You should load-balance the CAS servers in your CAS array and point BES to the load-balanced address of the CAS array.Ed Crowley MVP " There are seldom good technological solutions to behavioral problems."
 
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