Troubleshooting: Outlook® Integration with Act!

Have a question on Act! and Outlook® integration? Below are some common troubleshooting articles. Don’t see what you’re looking for in this list? Search our Knowledgebase for a specific error message you’re receiving or symptom you’re experiencing.

The email systems window is empty if I have Build 8201 of Office 2016 installed.
What are the supported versions of Microsoft® Office for Act!?
How do I use Microsoft Office as my email client in Act! version 2011 or later?
How do I set preferences for Act! and Microsoft Outlook Synchronization in Act! versions 17 and later?
Contact and Calendar sync between Act! and Outlook is not working when using Act! with Outlook 2016 or with Outlook 2016 obtained through an Office 365 subscription.
Act! icons are missing from my Microsoft Outlook toolbar.
No history is created or recorded when I send an email from Microsoft Outlook 2003 and later.
I’m getting the following error when I send an email from Microsoft Outlook 2003 and later: “Sorry we’re having trouble starting Outlook. Only one version of Outlook can run at a time. Check to see if another version of Outlook is running.”
How do I rebuild the registry keys for the Act! Outlook Addins?