Network Engineer

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that didn't work, thanks for the suggestions
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I have users running outlook 2016, with exchange 2016. <br />
<br />
I have a user that after composing an email, after a minute or two, when go try to send it, they get this error message:<br />
&quot;the function cannot be performed because the message has been changed&quot;<br />
<br />
Any ideas how to fix?
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I have users running outlook 2016, with exchange 2016. 

I have a user that after composing an email, after a minute or two, when go try to send it, they get this error message:
"the function cannot be performed because the message has been changed"

Any ideas how to fix?

outlook error: &quot;the function cannot be performed because the message has been changed&quot;

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

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.

outlook error: &quot;the function cannot be performed because the message has been changed&quot;

outlook error: "the function cannot be performed because the message has been changed"