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emiahmadFlag for Saudi Arabia

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IMAP Client issues with Exchange 2010 SP2

Hello all,

I have Exchange 2010 CAS/HUB  LB  with A10 hardware  and DAG,

from inside my clients cant send from outlook if they are checked   My outgoing server requires authentication  option  in the outlook 2010

if this option is checked they cant send also receives message that the client can not be authenticated or Server error: '501 5.1.3 Invalid address'


Delivery has failed to these recipients or groups:

User generated image
From outside when all users use the internet connection  the  My outgoing server requires authentication  must be checked if not he will face the same issues how i can fix this , thanks.
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Sumesh BNR
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but it;s not my issues i just need to make sure that Imap4 clients use only one settings in and out side my organization   to check my outgoing  server requires authentication or not , thanks
You have to enable the option to require authentication for outbound email, and you have to enter credentials, in the format of either username@ domain (where domain is your WINDOWS domain FQDN) or domain\username.

Although if you are using Outlook, why use IMAP? Use Outlook Anywhere instead.

thanks simon,

when i enable require authentication option i face this,

User generated image

but if i do it through the internet it works fine ,

outlook any where has alot of problems i don't know why later on i will open related cases , :)
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Simon Butler (Sembee)
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