MS Outlook: reply all shortcut not always working #11196

Steps to reproduce:

1. Set NVDA language to French
2. Open an Outlook message
3. Press Control+shift+R to reply to all

Actual behavior:

Nothing happens at step 3. and an error is found in the log (cf. log
OutlookReplyAllError.log
)
Pressing NVDA+F2 before step 3. allows to get the expected behavior.

Expected behavior:

A new message window open with the caret being in a message in edition and all e-meils of recipients in the To or Cc fields.

Additional comments

• The issue occurs only with some messages, not all of them.
• Issue probably introduced by my own PR Vocalize MS Word change tracking activation and deactivation. #10212.

System configuration

NVDA installed/portable/running from source:

Installed

NVDA version:

2020.1

Windows version:

Windows 10 1903

Name and version of other software in use when reproducing the issue:

MS Outlook 2016.

Other information about your system:

Other questions

Does the issue still occur after restarting your computer?

Yes

Have you tried any other versions of NVDA? If so, please report their behaviors.

NVDA 2019.3.1: same issue.
NVDA 2019.2.1: no issue.

If addons are disabled, is your problem still occuring?

Yes

Did you try to run the COM registry fixing tool in NVDA menu / tools?

Yes.