Forward message headers from Yahoo

“People aren’t getting my emails!” The hidden, Internet message headers in an email are vital for troubleshooting email delivery. Without those headers, your IT department will have a very hard time troubleshooting a problem like this. You can’t just forward the email because that only forwards the contents of the email and the To/From fields. It doesn’t forward any of the actual headers. Instead, you […]

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Two Ways to Export a List of Microsoft 365 Group Members

It’s easy to find instructions for exporting an Outlook Contact Group to a csv file, but there’s no built in way (as of today, at least) for an end user to export the membership of a Microsoft 365 (Office 365) Group. Here are two ways it can be done, one for an Exchange Administrator via PowerShell and one for an end user via Microsoft Outlook. […]

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Access a Shared FOLDER in Outlook Online

If you Google “open a shared folder in outlook online” you’ll get many results telling you how to open a shared mailbox, rather than a shared folder. Not very helpful. You can’t open another mailbox in Outlook Online unless you have Full Access permissions. If someone has shared a folder with you or if your organization doesn’t grant Full Access permissions to shared mailboxes by […]

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Creating and Sharing a Personal Calendar in Exchange

Many times Exchange users want to share a personal calendar with coworkers without jumping through the hoops of requesting a new shared or resource mailbox. I’m going to tell you how to do that without setting delegates or giving away more information than you want. (These instructions are for Outlook 2016, but they should be pretty close for 2013 & 2010.)   1. Switch Outlook […]

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Message bounces with StorageError when attaching another email

If you attach one email to another, you might get this bounce message (aka “NDR” or Non-Deliverable Report): John Doe ( The e-mail system had a problem processing this message. It won’t try to deliver this message again. Diagnostic information for administrators: Generating server: #550 5.6.0 M2MCVT.StorageError; storage error in content conversion ## You probably have Outlook configured in “online” mode. In other […]

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Outlook OST file is in use and cannot be accessed

If Outlook doesn’t shut down properly for whatever reason–and those reasons could be legion–you might see this error the next time you try to start it: A restart of your computer will fix this problem 95% of the time. However, that’s not always immediately practical and what do you do if it doesn’t? First, if you can’t reboot right now, open the Task Manager and […]

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New Outlook Profile: The Connection to Microsoft Exchange is Unavailable

When setting up a new Outlook profile (in 2010 & 2013, at least), sometimes you’ll see this error: The action cannot be completed. The Connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action. This is almost never because Exchange is unavailable or because Outlook is offline. The problem is because something has gone wrong with the Autodiscover process […]

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