AGAIN, AGAIN AND AGAIN I’M GETTING THE SAME ERROR MESSAGES. UNTIL WHEN FOR GOODNESS SAKE!!!???:
 
When trying to delete, open or move files from junk folder I get the following messages:
 
On trying to delete a file:  “AN UNKNOWN ERROR HAS OCCURRED”
 
On trying to open a file: “A PROBLEM OCCURRED WHEN TRYING TO OPEN THIS MESSAGE”

I'm totally sick of MS constantly making us waste our time with desperate frustration and give us heart attacks! 

An unknown error has occurred.

Subject 'test'
Server Error: 554
Server Response: 554 omta02.westchester.pa.mail.comcast.net comcast Port 25 not allowed - http://customer.comcast.com/help-and-support/internet/email-client-programs-with-xfinity-email/
Server: 'smtp.comcast.net'
Windows Live Mail Error ID: 0x800CCC6F
Protocol: SMTP
Port: 25
Secure(SSL): No

I am installing Home and Business 2011 on a MacBook Air (10.6.8). The machine has Entourage 2008 on it and is connect to Exchange 2003 Server. I want to install Office 2011 and not use any of the Entourage data. In fact I will point it to Exchange online. However after I have installed Office 365, I get the error "Could not change to that identity. An unknown error has occurred in Outlook.

 

I have tried pressing alt and opening outlook and rebuilding the database however it will not go pass step 1.

 

I have managed to get this work in another Mac however this one and another get the error. The version of Office 2011 is 14.2.2 right out of  the box.

 

 

Thanks

 

Barry 

After installing and later reinstalling Microsoft Office for Mac 2011 on my new MacBook Pro, my Outlook worked fine.  

However, yesterday I reinstalled again using the same DVD on the same computer and Outlook now no longer works.  

It says: “Could not change to that identity. An unknown error has occurred in Outlook”.  

When I press "OK", it then tells me to "Select an identity".  

There is only one identity showing, which is "Main identity".  

When I press "OK", it goes back to the previous error message, and so on, backwards and forwards between the two messages, and Outlook never opens.  

Can anyone help? Thanks.

Jonathan

I can receive emails but for the last 24hrs I have been unable to send emails. When it asks if I would like to post emails in my outbox and I press yes a message comes up asfollows

An unknown error has occured

subject of email severer llysawel

windows Live Mail error ID 800CC0B

Protocol SMTP

Port25

Secure(SSL)no

 

I have tried closing down the computor but to no avail

I am unable to send messages from my windows live mail  and keep getting this message:

An unknown error has occurred.

Server: 'mail.optusnet.com.au'
Windows Live Mail Error ID: 0x80070057
Protocol: SMTP
Port: 25
Secure(SSL): No

One of my messages had photos attached and I opened the Windows Live ID and tried to send the messages, but the error still remained. I tried  switching the Protocol SMTP Port from 25 to 587, but still the same.

Does anyone have wisdom to share?

Regards

John Cosstick
I have just purchased a new MacBook Air and just installed Microsoft Office 2011 Business.  I want to set up Outlook to use my 'gmail' email account and am trying to set this up.  When I try to open Outlook, for the first time, it asked me to select an identity.  I select Main Identity, not sure what this means, I am getting a message "Could not change to that identity. An unknown error has occurred in Outlook".  Also when I selected Quit it happened.  I have gone into 'preferences' 'mail, contacts & calendars and put in my gmail account, but still get error.  Eeek... What am I doing wrong?
I cannot open outlook for mac 2011 anymore
the error message reads "Could not change to that identity. An unknown error has occurred in Outlook." I have tried to reinstall office, and have followed other advice online to identity problem.  previous to this outlook routinely wiped out my contact list, and regularly crashed.  

An unknown error has occurred.

Subject ''
Server Error: 554
Server Response: 554 omta01.westchester.pa.mail.comcast.net comcast Port 25 not allowed - http://customer.comcast.com/help-and-support/internet/email-client-programs-with-xfinity-email/
Server: 'smtp.comcast.net'
Windows Live Mail Error ID: 0x800CCC6F
Protocol: SMTP
Port: 25
Secure(SSL): No

original title: I am receiving the error message below when trying to send e-mail via Windows Live.  I can receive e-mail, but can not send them, even to myself.

 

An unknown error has occurred.

Subject ''
Server Error: 554
Server Response: 554 omta01.westchester.pa.mail.comcast.net comcast Port 25 not allowed - http://customer.comcast.com/help-and-support/internet/email-client-programs-with-xfinity-email/
Server: 'smtp.comcast.net'
Windows Live Mail Error ID: 0x800CCC6F
Protocol: SMTP
Port: 25
Secure(SSL): No