Category Archives: Exchange

Pushing and auditing companywide Exchange mailbox calendar permissions for multinational firms via Powershell

Posted on February 23, 2024 by mell9185

My team recently received a request to grant editor access to every employee’s mailbox so that our homegrown time off management system could push approved entries in the calendar of end users. We are currently an Exchange Hybrid environment, and … Continue reading →

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Custom RBAC roles in Exchange Online do not work as expected when compared to on premises Exchange servers

Posted on December 29, 2023 by mell9185

At our company we have created multiple paired down RBAC roles for various business units like Information security and our various regional helpdesks. As we started our journey into Office 365 in 2019, we replicated these paired down RBAC roles … Continue reading →

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Inventorying what extensionAttributes are used in your Active Directory Environment

Posted on July 10, 2023 by mell9185

Recently we my team was asked what extensionAttributes were in use in my company’s Active Directory environment so I wrote this quick PowerShell script to search for any filled in extensionAttribute and compile a list of that objects Then compile … Continue reading →

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Adventures in PowerShell dot sourcing

Posted on April 15, 2020 by mell9185

As my company has started our journey to Office 365, we have had to go back and update a lot of our daily checks, scripts, and automations we put in place for user accounts. As a specific example we have … Continue reading →

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Properly scoping get-inboxrule for a custom RBAC role group

Posted on March 21, 2019 by mell9185

After creating a custom RBAC role in Exchange for our help desk so that they could handle simpler end user requests like mailbox size, conference room permissions, etc. after deploying it we got reports that the get-inboxrule command was not … Continue reading →

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Checking Exchange IIS logs for users who downloaded files via OWA

Posted on March 12, 2019 by mell9185

At my work we use a 3rd party application that rides ontop of OWA in Exchange in order to block attachment downloads across certain IP ranges (namely all external access). We recently had an issue with it silently failing and … Continue reading →

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Undocumented Change in 2016 MessageID header behavior

Posted on January 15, 2018 by mell9185

At my company, we recently migrated from 2013 to 2016, but had to keep a 2013 footprint around for support of older Blackberry 5 devices. In our environment, we have a SendMail farm that is an internal open relay as … Continue reading →

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How to remove a user from a security group in a different domain in PowerShell

Posted on December 6, 2017 by mell9185

Recently I ran into an issue at my company removing a user in our primary domain from a group in our root domain using the AD cmdlets in PowerShell. All my company’s user, computer, and group objects are in our … Continue reading →

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Getting Exchange 2013/2016 Add-ins (Outlook Apps) working through a proxy

Posted on November 19, 2017 by mell9185

Like most companies, my organization uses a proxy for all internet traffic. This presented a problem when we tried using Add-ins for Exchange 2013. At the time we could not figure out how to get the subsystem that pulled down … Continue reading →

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Log parser query to get Exchange clients below a certain patch level

Posted on July 14, 2017 by mell9185

At my company we are currently in the early stages of an Exchange 2013 to Exchange 2016 migration and we needed to identify any Outlook clients below a certain patch level (ones we identified as having issues with Mapi over … Continue reading →

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