EWS API throws error “No Mailbox with such GUID”

Recently i was working with an ISV/application developer, who created this custom application using EWS (Exchange Web Services) API. It worked with the account with impersonation rights to access other mailboxes/calendars in Azure/Office 365/Exchange Online. But when they tried to access a specific mailbox calendar, they see the error “No mailbox with such GUID”. We…


Exchange Server Quarterly Servicing updates, changes, zero day vulnerability fixes released

Yesterday we released Exchange Server quarterly servicing Cumulative Updates (for Exchange 2013/2016/2019) and Rollup Update (for Exchange 2010) for all supported versions of Exchange Server. Few highlights were, These updates have the fixes to mitigate the zero day and related vulnerabilities. An architectural change to EWS Push notification authentication – this change addresses the EWS…

3

Zune Software: Installation failed with error code 0x80070643

Recently I tried to install Zune Software in my PC, encountered installation failed with the error code: 0x80070643 and message “Setup must stop because the required package ‘Zune"’ didn’t install. Done research and found the following Microsoft support knowledge base article – states that “A required component cannot be installed when you try to install…

22