Microsoft Exchange groups (lists) contained in other groups are ignored

I have several groups (distribution lists) defined under Contacts in a Microsoft Exchange account. Some of the groups contain other groups. On sending an email to such groups, the other groups contained within, are ignored.

For example:

group1 = a@eg.com, b@eg.com
group2 = group1, c@eg.com, d@eg.com

When sending email to group2, I expect the email to go out to a@eg.com, b@eg.com, c@eg.com, d@eg.com. But the contained group1 is ignored, and the email goes out to only c@eg.com, d@eg.com.

NOTE that these groups were defined outside of eM client (from Outlook), and work fine in the Outlook client.

It could be a limitation of the way eM Client accesses the Exchange data. In eM Client when you include one distribution list inside another, it unpacks the addresses so you have just a single combined list of names and addresses.

If you have a Pro License, you could open a support ticket and eM Client will be able to help you further.