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Your Microsoft Exchange server is unavailable

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Your Microsoft Exchange server is unavailable - 27.May2009 9:06:25 AM   
ctvu

 

Posts: 113
Joined: 9.May2008
Status: offline
Hi All,

Currently we have 3 offices say A, B, C.

Office A (router 877) <--VPN site-to-site----> (router 877) Office B, at office B we have an Exchange 07 server, users at Office A have never complained about they cannot connect to Exchange or drop out at all and that has been for 1 years.

Office C (ASA 5505) <---VPN site-to-site--> (router 877) office B, We just created this VPN last  week in order to allow users at office C to connect the Exchange server at office B, here is my issue: when I started to connect/ open Outlook 2003 and 2007, it took so long sometimes I could not connect at all, sometimes even I got connected, but  I still got disconnected here and there, and I got an error message as above.

Office A and Office B are the same domain.
Office C is totally different domain, between B and C I created 2 way trust and VPN site-to-site up and running well. Of course everytime we open outlook 2003 or 07 we are prompted for the credential.

Any idea/ help would be much appreciated.

Regards
Post #: 1
RE: Your Microsoft Exchange server is unavailable - 27.May2009 11:44:24 AM   
John Weber

 

Posts: 1236
Joined: 20.Apr.2005
From: Portland, Oregon
Status: offline
I do not know the technical reasons, but I have seen MAPI across VPN being crappy.  How do the clients connect?  Have you tried OA for that office?  That would put things onto HTTP/S.

_____________________________

John Weber [Lync MVP] http://tsoorad.blogspot.com

(in reply to ctvu)
Post #: 2
RE: Your Microsoft Exchange server is unavailable - 28.May2009 7:31:26 AM   
ctvu

 

Posts: 113
Joined: 9.May2008
Status: offline
Thank you John for your info.
Since the VPN site-to-site is already establised, so the clients just connect to the Exchange as normal.
If I am not inside the ASA firewall (say home) and I connect to the exchange using VPN client, the connection is perfect fine, never drop out. But the problem just when I am behind the ASA firewall, very slow and intermitent connection.

Cheers

(in reply to John Weber)
Post #: 3
RE: Your Microsoft Exchange server is unavailable - 28.May2009 11:43:08 AM   
John Weber

 

Posts: 1236
Joined: 20.Apr.2005
From: Portland, Oregon
Status: offline
I am not Mr. ASA, so I cannot advise.  But it would seem that you have narrowed your issue down to the problem spot.

_____________________________

John Weber [Lync MVP] http://tsoorad.blogspot.com

(in reply to ctvu)
Post #: 4

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