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&quot; When they receive task assignments from any other user, using either OL2007 or OL2013, &quot;<br />
<br />
What type of account do these users have?<br />
<br />
Are they IMAP Accounts? Is it possible some of the Invites are comming from IMAP Accounts?<br />
<br />
There is a knonw issue in outlook where Sending Tasks through such account will break the accept and Decline Options<br />
<br />
At present there is no solution, oly a work around<br />
Which is for the Sender to Send the Task through POP account
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This wasn't actually a solution, but it allowed me to close the question. &nbsp;Just a limitation of working with third-party hosted exchange servers.
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I have a two users with Outlook 2007 and POP mailboxes. &nbsp;When they receive task assignments from any other user, using either OL2007 or OL2013, the tasks are static HTML emails, without Accept or Decline buttons. &nbsp;I have already tried these things:<br />

<h2>1. </h2>
Deleting and rebuilding the Outlook contact, with &quot;Send in Rich Text&quot; enabled for the e-mail address
<h2>1. </h2>
changing settings for the sending Outlook client to &quot;Send RTF messages in Rich Text Format&quot; 
<h2>1. </h2>
typing the address by hand and then manually selecting &quot;Rich Text Format&quot; in the address properties.Is there something else I can try?
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I have a two users with Outlook 2007 and POP mailboxes.  When they receive task assignments from any other user, using either OL2007 or OL2013, the tasks are static HTML emails, without Accept or Decline buttons.  I have already tried these things:
: Deleting and rebuilding the Outlook contact, with "Send in Rich Text" enabled for the e-mail address
: changing settings for the sending Outlook client to "Send RTF messages in Rich Text Format" 
: typing the address by hand and then manually selecting "Rich Text Format" in the address properties.
Is there something else I can try?

&quot; When they receive task assignments from any other user, using either OL2007 or OL2013, &quot;

What type of account do these users have?

Are they IMAP Accounts? Is it possible some of the Invites are comming from IMAP Accounts?

There is a knonw issue in outlook where Sending Tasks through such account will break the accept and Decline Options

At present there is no solution, oly a work around
Which is for the Sender to Send the Task through POP account

This wasn&#39;t actually a solution, but it allowed me to close the question.  Just a limitation of working with third-party hosted exchange servers.

Outlook 2007 assigned tasks received as HTML e-mail.

I have a two users with Outlook 2007 and POP mailboxes.  When they receive task assignments from any other user, using either OL2007 or OL2013, the tasks are static HTML emails, without Accept or Decline buttons.  I have already tried these things:
: Deleting and rebuilding the Outlook contact, with &quot;Send in Rich Text&quot; enabled for the e-mail address
: changing settings for the sending Outlook client to &quot;Send RTF messages in Rich Text Format&quot; 
: typing the address by hand and then manually selecting &quot;Rich Text Format&quot; in the address properties.
Is there something else I can try?

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.