Outlook gives some users grief by requiring that they re-enable the EIOBoard Add-In every time they open Outlook. If you set the EIOBoard Add-In behavior to 'Always Load' from the registry, this setting could resolve your issue. Note: The name of your Add-In depends on the version could be either: EIOBoard Outlook Addin 2010 or Savance.EIOBoard Outlook Add-in.

Instructions in this article discuss how to set that key for an Outlook Add-In:

Look in the registry and set the 'Load Behavior' to 3 under-

1. Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\Outlook\Addins\Savance.EIOBoard Outlook Add-in x64

2. Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\Outlook\Addins\Savance.EIOBoard Outlook Add-in x64

You can also make sure that Outlook isn't disabling EIOBoard at the same time by clearing out the entries in:

• HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\1x.0\Outlook\Resiliency\DisabledItems
• HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\1x.0\Outlook\Resiliency\CrashingAddinList

and Adding a dword entry called 'Savance.EIOBoard Outlook Add-in x64' with a value of 1 under-

• HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\1x.0\Outlook\Resiliency\DoNotDisableAddinList

 For more information see Step 2 in our Outlook Troubleshooting Guide

Other Versions:

Outlook 2013 and Later

Adding a dword entry called  Savance.EIOBoard Outlook Add-in x64 with a value of 1 under-

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\1x.0\Outlook\Resiliency\DoNotDisableAddinList

Where '1x.0' represents your current version of Outlook.

Additional references:

https://blogs.msdn.microsoft.com/emeamsgdev/2017/08/02/outlooks-slow-add-ins-resiliency-logic-and-how-to-always-enable-slow-add-ins/

https://www.slipstick.com/outlook/always-load-an-outlook-addin/

Office 365

 not respond to the Add-In resiliency from a Registry Key. Many Office 365 subscriptions allow you to install the Desktop (Full) Version of Outlook. 

The best option is to install the desktop version of Outlook and maintain the Add-In resiliency locally. Otherwise, you are forced to click: " Do not check this Add-in for 30 days" every month.

To find out if you can download a full version:

1. Uninstall the EIOBoard Outlook Add-In (from Settings --> Apps)
2. Sign into your O365 account: https://portal.office.com/
3. Click the Install Office Apps link
4. Install the Full Version of Outlook
5. Install the EIOBoard Outlook Add-In

After installing the EIOBoard Add-In, apply the "Always Load" behavior mentioned above. This will resolve the issue.

Here are some additional troubleshooting guides for the Outlook Add-In
http://support.savance.com/index.php?/eioboard/Knowledgebase/Article/View/56/0/why-is-my-outlook-add-in-disappearing
http://support.savance.com/index.php?/eioboard/Knowledgebase/Article/View/226/0/how-to-troubleshoot-outlook-add-in-issues