On errors:

Mapi session “/o=COMPANY/ou=Europe/cn=Recipients/cn=User1? exceeded the maximum of 32 objects of type “session”.

Task “Microsoft Exchange Server” reported error (0×80040115): “The
connection to the Microsoft Exchange Server is unavailable. Outlook must be
online or connected to complete this action.”

Task ‘Microsoft Exchange Server’ reported error (0×8004011d): ‘The server is
not available. Contact your administrator if this condition persists.’

Don’t waste your time on profile recreation … It doesn’t help!!!

Things to check .

1.      Ping to exchange server by short name and FQDN

a. If no ping check connectivity and name resolution.

b. Consider adding exchange name/ip to hosts file

2.      Go to file and check if “Work Offline” is not checked

a. If it is uncheck it.

3.      If you have check point client try to

a. Disable security policy

b. Stop Vpn client

c. Remove checkpoint secure remote “v” on local area connection properties ( do it only for testing – remember if you remove the “v” user will be not able to dial VPN.

4.      Run Outlook.exe with rpcdiag switch “outlook.exe /rpcdiag” see where is hanging

5.      On exchange system manger open user related mailbox store in logons section check if user exceeded maximum of 32 connections to the store.

a. If do : To solve this problem for this user, download the sysinternals tool called TCPView and run it on your Exchange server. You will see a whole bunch of connections. Work out the IP address of user, and then using TCP view terminate all sessions to that IP address.

b. Other option is to mount / unmount store – not recommended

6.      In order to Increase default 32 MAPI connections limit do the following things

a. Click Start, click Run, type regedit in the Open box, and then click OK.

Locate and then click the following registry sub key: HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesMSExchangeISParametersSystem

If the Maximum Allowed Sessions Per User entry does not exist, do the following:

On the Edit menu, point to New, and then click DWORD Value.

Type Maximum Allowed Sessions Per User as the entry name, and then press ENTER.

Right-click the Maximum Allowed Sessions Per User entry, and then click Modify

Click decimal, type the value that you want to set in the Value data box, and then click OK.

Exit Registry Editor.

Click Start, click Run, type services.msc in the Open box, and then click OK.

Click the MSExchange Information Store service, and then click Restart Service.

Didn’t solve the problem ? Read Related Microsoft solutions

http://support.microsoft.com/kb/842022

http://support.microsoft.com/kb/830836

http://support.microsoft.com/kb/840835

http://support.microsoft.com/kb/821188

http://support.microsoft.com/kb/821188

http://support.microsoft.com/default.aspx?scid=898060

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