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Exchange online or Exchange on-premises? If on-premises, what version of Exchange? Does this happen only to Outlook 2019 or also to Outlook 2016/2013/etc.?
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There are many bugs out with 2019, update office and Windows to the max for best performance.&nbsp;
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<br>Michael B - Hi. Its Exchange on-premises 2010 &nbsp; <br>We use the Outlook that comes with Office 365 - The equivalent of 2019?&nbsp;<br><br>
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Sunny

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What could be causing this? <br>Any ideas ...&nbsp;<br>Thanks, <br><br><br>
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What could be causing this?
Any ideas ... 
Thanks,

Update office for invites only there when close / reopen Outlook 2019

Microsoft Office is an integrated suite of applications that includes Outlook, Word, Excel, Access, PowerPoint, Visio and InfoPath, along with a number of tools to assist in making the individual components work together. Coding within and between the projects is done in Visual Basic for Applications, known as VBA.

Microsoft Office

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.