Hi @Adel B
For better analysis, I would confirm more information.
In general, new features of Microsoft 365 Apps may not be supported by Office 2016, but Office 2016 settings are less frequently incompatible on Microsoft 365 Apps.
When sending documents word document .Docx to a customer or a partner with word in version MS 365 apps for entreprise
May I know how do you send Word documents? Such as via Outlook emails, OneDrive shared link or others.
the tables jumps are no more in the correct form, same think for referrals
Do these document use your company-specific templates or any features of 3rd party add-in? Are the tables set with a specific format or style?
If conditions permit, it is recommended to take screenshots of relevant images. (Please note, if there is any privacy information, you need to cover it.)
Currently, I suggest you turn off AutoFit to have a check. You can go to Ribbon> Layout> AutoFit button > Fixed Column Width.
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