Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Dear Parth Patel,
Good day! Thank you for posting to Microsoft Community. We are happy to assist you.
- You may try to verify if you're using the same subscription ID that was returned in a previous response.
- You may also ensure that you're sending the subscription ID for the correct ExchangeService object.
You can refer to Handling notification-related errors in EWS in Exchange | Microsoft Learn
In the meantime, I do understand your query here but, as your query seems related to Exchange Web Services (EWS) and since Microsoft has specific support channel resource for certain different support scope and attributes, we are belong to Microsoft Forum Community mainly focused on Micrsoft 365 Exchange online only. Therefore, we provide some limited knowledge about some aspects of EWS related scenarios. For EWS, we have a dedicated team with special expertise in EWS and related queries, so would you mind to connect and place your query on our dedicated Exchange Server Development - Microsoft Q&A? We believe they will give you accurate and efficient solution for your concern.
Thank you for your precious time and understanding. For other concerns, please do not hesitate to add your post in the Microsoft Community Team.
Stay safe and healthy. Have a nice day!
Sincerely,
Libeamlak | Microsoft Community Moderator