Hi @Christopher Navarro ,
Welcome to our forum!
What's the version of your Outlook 2019? (File > Office Account > About Outlook)
According to your description, I notice that the issue doesn't occur with other machines running Outlook 2016, please check if there're any differences between them and the machine running with Outlook 2019, such as some third-party programs.
For the thread you provided, besides rollback version, have you tried other suggestions mentioned in this thread? If not, please try the following troubleshooting:
- Considering that the current outlook data file is damaged or the profile may be damaged, it is suggested that you could try to create a new profile(Control Panel>Mail>Show Profiles>add) and add the account to check if there are any differences.
- As I know, some add ins may also affect this, It is suggested that you try to start outlook in safe mode(win+R>type: outlook /safe) to check whether it works normally.
- I notice this issue occurred on the specific machine, considering the impact of some third-party programs on your computer, please try to perform a clean boot for windows and check if the issue still occur.
- If the issue still exists, considering that it would also be affected when the Outlook program itself is damaged, it is recommended that you try to fix the Office application.
Hope the above help!
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