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URGENT   Outlook clients Cannot access exhange 2010 server

Posted on 2013-06-18
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Last Modified: 2014-07-08
Came in yesterday to our mail server playing up outlook clients could not connect to it.
From the server console I can connect to it & use logmein, I can browse the web etc. but cannot VNC to it or get outlook client to connect, or connect via telnet.
the windows firewall has been turned off with all settings to allow no difference. I can also access webmail on the server console  but not from a pc.
All incoming connectivity is being blocked???
Has been escalated to Microsoft as business critical...still waiting, so I thought I'd better get the experts involved...come on guys don't let me down
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Question by:rmvgray
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15 Comments
 
LVL 43

Expert Comment

by:Amit
ID: 39255660
Would you restart all Exchange services and check again. also do you have any HLB or NLB in between, if yes, restart that too and check.
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Author Comment

by:rmvgray
ID: 39255676
Server has been restarted numerous times. Still the same.. can do anything from the server out but nothing inbound
 HLB NLB???
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Author Comment

by:rmvgray
ID: 39255678
Domain controllers have been restarted as well
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Author Comment

by:rmvgray
ID: 39255679
All other servers working fine....
0
 
LVL 43

Expert Comment

by:Amit
ID: 39255762
HLB: Hardware load Balancer
NLB: Network Load Balancer

Normally there are two main reason for outlook connectivity issue:
1) DNS Setting or wrong Subnet
2) Office customization. (check if you have any .prf file in user machine, if yes open it with notepad and check which server it is pointing)

Starting check both these two items.

Also run ExBPA tool and check for any errors.
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LVL 9

Assisted Solution

by:VirastaR
VirastaR earned 250 total points
ID: 39256110
Hi,

A good place to start with is with EXBPA.
Check this
http://blogs.technet.com/b/exchange/archive/2010/07/28/3410533.aspx

It will give you what direction you should take to troubelshoot this issue like Exchange/AD/DNS/Network etc

Hope that helps :)
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LVL 11

Expert Comment

by:James Hodge
ID: 39256564
Can you connect to the server in any other way? Remote desktop, file shares etc.

If not, then it's nothing to do with Exchange. Windows Firewall or AntiVirus - or networking? Internal DNS?

James
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Author Comment

by:rmvgray
ID: 39256825
Microsoft been on it 5 hours now......

Cant connect to it using telnet, RDP, VNC or via shares, butcan usingsing logmein
From the server I can RDP any other server, VNC any other server & access shares
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LVL 43

Expert Comment

by:Amit
ID: 39256846
That's a way MS burns customer hours.....escalate to next level engg....Tier3 or above...
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Author Comment

by:rmvgray
ID: 39256963
already have done.....
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Accepted Solution

by:
rmvgray earned 0 total points
ID: 39271683
Ok this is what happened...
A Corrupt group policy was forcing a software firewall to Windows 2008 servers (mail runing on 2008 & when we went to build a temp server & joined it to the network same problem), which had corrupted the registry, and Microsoft confirming there was a virus on it, didn't help the situation either. So rebuilding was the only option, well an exchange server recovery was. That went ok except it left a few holes.
Blackberry server not working having now installed Exchange 2010 SP2 Certificate issue
Out of office coming up with and error “Server not available”
Symantec Backup Exec 2012 services not starting
 Certificate issue – Server using incorrect certificate so users were getting security warnings
Fix permissions after a failed installation of Exchange 2010 (Couldn’t access EMC Server configuration Client Access)
Configure Exchange 2010 to work with a single certificate
Install ASP as recommended by the Exchange heath monitor
Windows Updates
Rebooting and testing active sync for mobile phones and OWA, and Outlook 2007 sending and receiving email
Certificate issue also fixed BES Server problem
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LVL 43

Assisted Solution

by:Amit
Amit earned 250 total points
ID: 39271739
how you recovered the server? Ideal way is to use recover switch.
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Author Comment

by:rmvgray
ID: 39271748
We did use the recover switch " as I said well an exchange server recovery was".
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Author Closing Comment

by:rmvgray
ID: 40133773
Was a old group policy from way back when, which didnt know about Windows Server 2008 onwards
0
 
LVL 9

Expert Comment

by:VirastaR
ID: 40182703
Thanks for taking time to share the root cause of the issue.

Really helpfull :)
0

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