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Thank you for sharing the details of the issue.
This behavior is often related to the time-zone setting configured for your Dynamics 365 user rather than the time displayed on your computer. A mismatch between the Dynamics 365 user time zone and the Windows time zone, particularly with daylight-saving settings, can cause dates or times to appear differently.
Please check the following:
- In Dynamics 365, go to Settings > Personalization Settings.
- On the General tab, locate Set the time zone you are in.
- Make sure the selected Time Zone matches the time zone configured in Windows.
- Save the changes, then refresh Dynamics 365 or sign out and sign back in.
You can also verify your Windows settings under Settings > Time & language > Date & time. Please confirm that the correct time zone is selected and review the daylight-saving settings.
If the Dynamics 365 time zone is already correct, it would also be helpful to check the behavior of the affected date/time field. In Dataverse, date/time fields can use different time-zone behaviors.
For example, User Local values are displayed according to the user's local time zone, while Time-Zone Independent values are displayed without time-zone conversion.
Since the difference is exactly one hour, I recommend starting by comparing the Dynamics 365 user time-zone setting with the Windows time-zone and daylight-saving settings.
If the same behavior continues in a clean environment without any relevant policies or customizations configured, I suggest you contacting the Dynamics 365 support team for further investigation. When opening a support request, it would be helpful to include the affected user's Dynamics 365 time-zone setting, the Windows time-zone setting, details of the affected activity or field, and an example showing the one-hour difference.
I hope this helps you identify the cause of the time difference.
References:
Set personal options in Dynamics 365 Customer Engagement (on-premises) | Microsoft Learn
Specify time zone settings for a user (Microsoft Dataverse) - Power Apps | Microsoft Learn
Set a user's preferred time zone - Finance & Operations | Dynamics 365 | Microsoft Learn
Time zone entities (Developer Guide for Dynamics 365 Customer Engagement) | Microsoft Learn
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