RESOLUTION:
1. Add this parameter to the MNE default settings (and any template used) and migrate again
[Exchange]
......
RewriteRTF=<#>
......
The parameter Accepts a single digit, 0–7, that specifies which (if any)
of migrating mail, appointment and task items the wizard should pass through
Microsoft’s rich-text converter—which in many cases will refine
the exported compound document format from Notes’ own converter.
The parameter value must be one of these digits:
0: None
1: Mail Only
2: Appts Only
3: Mail + Appts
4: Tasks Only
5: Mail + Tasks
6: Appts + Tasks
7: Mail + Appts + Tasks
Example:
[Exchange]
RewriteRTF=1
2. if you are using template, then you will need
to add the parameter to that template as well
3. You will need to use RemigrateMode=0 to remigrate
[Exchange]
....
RemigrateMode=0
....