This morning my outlook client became disconnected from my exchange server. I had been working for two hours and had been sending and receiving email until then. I then hand employees calling me, to let me know that they could not connect. I went through my logs and found that the edge server was not synching. I tried to force a sync and got a message saying that the hub transport server could not connect to the edge server. There was an error message that the LDAP server is unavailable. I removed the cetificate from both the hub server and the edge server. I recreated a certificate on the hub server and when I created a new synchronization xml file, a new certificate was created on the edge server. I exported the xml file from the edge server and impoted it onto the hub server. I also removed the edge synchronization from the hub server through the exchange console and used the command remove-edgesynchronization from the exchange powershell window on the edge server. These were the only solutions I could find on the internet and they did not work. I also uninstalled the exchange from the edge server and reinstalled. I can ping the edge server from the hub server and I can do a nslookup that finds the edge server from the hub server and I can do a nslookup from the edge server that finds the hub server. Can anyone give me another idea that would help? This server has been operating for two years with no problems. this is Exchange 2007 running on Windows 2003 servers.

You have combined problems which may or may not be related. Outlook connectivity has nothing to do with an Edge Transport role server, which only handles inbound SMTP mail, not client connections. Is there anything in the event log? What message do you get when you try to connect Outlook? -- Ed Crowley MVP "There are seldom good technological solutions to behavioral problems." . "wlhj" wrote in message news:bfc6677e-2dab-4024-809a-795148a54ac4... This morning my outlook client became disconnected from my exchange server. I had been working for two hours and had been sending and receiving email until then. I then hand employees calling me, to let me know that they could not connect. I went through my logs and found that the edge server was not synching. I tried to force a sync and got a message saying that the hub transport server could not connect to the edge server. There was an error message that the LDAP server is unavailable. I removed the cetificate from both the hub server and the edge server. I recreated a certificate on the hub server and when I created a new synchronization xml file, a new certificate was created on the edge server. I exported the xml file from the edge server and impoted it onto the hub server. I also removed the edge synchronization from the hub server through the exchange console and used the command remove-edgesynchronization from the exchange powershell window on the edge server. These were the only solutions I could find on the internet and they did not work. I also uninstalled the exchange from the edge server and reinstalled. I can ping the edge server from the hub server and I can do a nslookup that finds the edge server from the hub server and I can do a nslookup from the edge server that finds the hub server. Can anyone give me another idea that would help? This server has been operating for two years with no problems. this is Exchange 2007 running on Windows 2003 servers. Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Hi, As Ed mentioned, edge server doesn’t have relationship to the Outlook connection issue. How your Outlook connect to mail server? Pop3, imap4, RPC over HTTP or mapi(Exchange mode)? Does it happen only on your Outlook client or all users? Is there any related event error in your mailbox/CAS server? Thanks, Elvis