For booking meeting from outlook, we have integrated third party software with exchange 2010, and suddenly some users are started to receive repeated email notifications when they cancel any meeting request, and it is occurring for recurrence meeting cancellation request,
When we book a meeting through that third party software, we are receiving booking confirmation as a single email and which is expected, but when we cancel that meeting from outlook, some users are receiving repeated email notification( 3 to 4 emails) instead of single booking cancellation email.
In this regard, while we logged a support case with software vendor, they are suggesting to check exchange server which might be causing the issue. Appreciate if you please advise me, what can be investigated in the exchange servers. Or any workaround to isolate and investigate for the affected users.