Debug EWS subscription error – You have exceeded the available subscriptions for your account

Recently i was investigating an issue reported by an app developer. They created a custom EWS (Exchange Web Services) application which tries to open streaming subscription to Exchange Server 2013 using EWS. It worked fine for a while and later they noticed the following error: You have exceeded the available subscriptions for your account. Remove…

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Exchange Server 2010: EWS application crashes when calling GetStreamingEvents

One of my developer customer updated that he created an EWS Managed API based application which is getting crashed when they call the GetStreamingEvents operation to request notifications from a server that is running Exchange Server 2010; also the Client Access server (CAS) role installed. In general, the GetStreamingEvents response returns an array of items…


Exchange throttling: MAPI application fails with error “The information store could not be opened. [MAPI 1.0 – [MAPI_E_LOGON_FAILED(80040111)]]”

We recently resolved a case where a customer tries accessing Exchange Server 2010 mailboxes (DAG) via their custom Exchange MAPICDO based application. On average 2-3 days once, they’re frequently facing an error “The information store could not be opened. [MAPI 1.0 – [MAPI_E_LOGON_FAILED(80040111)]]” while attempting to connect to Exchange server 2010. After some days of…


Exchange Server 2010 Architecture and its feature set

You can download the following PDF file – a poster, which highlights the architecture and feature set of Microsoft Exchange Server 2010. Apart from showing the high-level architecture, it highlights the feature set of Exchange Server 2010 and sections include: Management and Monitoring High Availability Mailbox Server Role Client Access Server Role Unified Messaging Server…