We have figured out the issue. It is due to recent default paste setting change done by Microsoft. To keep the formatting, please follow the following steps:
- Change your default paste setting in Outlook from Editor options.
- To view these options in Microsoft Outlook:
- In an Outlook window, click File > Options > Mail > Editor Options > Advanced.
- Change pasting from other programs to “Keep Source Formatting” under the Cut, copy, and paste section.
