Exchange Slow when secondary DNS server is offline

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hi,

i found after power outage second domain controller (of 3) did not come online. hung @ post prompt. no big deal. resolved easy enough.

i noticed while dc offline outlook connections exchange painfully slow while dc offline.

that dc second dns resolver exchange servers , clients @ our main site.

i curious why dc in place redundancy cause such obvious problem exchange server client connections when not resolving dns queries exchange server or clients?

any thoughts on topic appreciated.

thanks

chris

hi sd48tech,

agree mr x's suggestion.

in additional, useipconfig /flushdns command flush dns cache on clients.

taking @ client's tcp/ip settings, ensure clients points out primary dc's address it's preferred dns address.

best regards,

andy_pan



Windows Server  >  Network Infrastructure Servers



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