- Fix Outlook connection problems in Office 365 and Exchange Online. 7/21/2020; 2 minutes to read; Applies to: Exchange Online; In this article. If you're using Outlook to access your Office 365 email account or another Exchange-based email account, and you're having problems, we want to get you back to sending and receiving email as quickly as possible.
- Outlook will use your default browser to open or preview many types of attachments. To change your default browser, see Change your default browser in Windows 10. When using Save All Attachments to a folder if a file with the same name exists Outlook creates a new file Filename (1), Filename (2), etc.
- If you’ve got an Office 365 subscription, then there might be times you need help from Microsoft. Here’s how to log a ticket from a client app, from a web app, or through your Office 365 account. All of these methods will create a ticket that goes to Microsoft support, but whichever way you log a ticket, you’ll need to be online.
Jul 21, 2020 Problem. When Office 365 users try to open or view attachments in email messages in Outlook Web App, they experience the following symptoms: In Office 365, the attachment isn't displayed in the message. Instead, a generic placeholder, such as '1 Attachment.
I don't know your background so I'll start with the basics. Please forgive me if this seems patronizing.Attachment is 30Mb, I'm guessing that should be MB as megabyte as files are normally notatedinstead of megabit as indicated. Internet speeds are listed in bits. There are 8 bits in a byte so you can count on internet speeds being at least 8 times slower than you might initially think.
You mention download speed is >= 90Mbps However, when sending an email you would be using the upload instead of the download. What speed do you have for the upload? If you have a 5Mbps upload speed it would be reasonable for it to take a few minutes to upload such a large attachment.
First step in troubleshooting here would be to run a speed test from the computer having the issue. Then another speed test from a computer not having the issue. Any significant difference in speeds could indicate an issue with that particular system or network connection. If both are about the same but low, you may have a larger issues to deal with. If both are about the same and as expected, then networking might not be the issue.
I would also like to point out that a lot (if not most) email servers have a size limit of 10-20MB on messages. It's possible (likely?) the email might be rejected by the recipient's server anyway.
Anyone who works with Office 365 knows that there is no shortage of new features rolling out, the pace at which new functionality is made available definitely keeps you on your toes.
Part of what inspired me to develop www.roadmapwatch.com is that I wanted to know more about when features progressed through the various stages on the official Office 365 Roadmap. Even with that tight watch of the roadmap, there are 164 features currently in some sort of “in progress” state and it’s hard to track them all.
On top of the features documented on the roadmap, there are occasionally small items that either slip through the cracks or aren’t worthy of a roadmap mention. One of those features is the “Common Attachment Blocking” feature in EOP that was introduced some time in the last month or so.
Below is a summary of what “Common Attachment Blocking” is all about…
Part of what inspired me to develop www.roadmapwatch.com is that I wanted to know more about when features progressed through the various stages on the official Office 365 Roadmap. Even with that tight watch of the roadmap, there are 164 features currently in some sort of “in progress” state and it’s hard to track them all.
On top of the features documented on the roadmap, there are occasionally small items that either slip through the cracks or aren’t worthy of a roadmap mention. One of those features is the “Common Attachment Blocking” feature in EOP that was introduced some time in the last month or so.
Below is a summary of what “Common Attachment Blocking” is all about…
The Timeline
Chatter about “Common Attachment Blocking (CAB)” started on one of the EOP blogs back around August 2015. In January of this year, there was a mention on a different EOP blog and on the Office blog that the feature would be coming in “the next quarter”. And then… Well, that was it. I never saw another mention of the feature or it’s rollout status.
Almas gemelas brian weiss pdf. It turns out that the feature was released in the last couple months and you’ll likely find it available in your tenant right now.
Almas gemelas brian weiss pdf. It turns out that the feature was released in the last couple months and you’ll likely find it available in your tenant right now.
A “New” Feature?
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There’s always been a way to block attachments by extension in EOP via a transport rule. However, using a transport rule gave you somewhat limited options when it came to the user experience. You could reject or delete a message with an attachment but there wasn’t a clean way to just strip the attachment and send the message along to the end user.
Using “Common Attachment Blocking”
You’ll find CAB buried in the Anti-Malware Filter Policy in EOP. From the Exchange Admin Center, if you navigate to “Protection” and then “Malware Filter”, you’ll see your default policy. On the “Settings” tab is the option to enable CAB; despite being “recommended”, it will be disabled by default in your policy.
Once enabled, there is a default list of 10 file extensions that Microsoft has selected and you can add more from a pre-defined list of 96 file extensions. All your favorites such as .exe, .com and .vbs are there.
Once enabled, there is a default list of 10 file extensions that Microsoft has selected and you can add more from a pre-defined list of 96 file extensions. All your favorites such as .exe, .com and .vbs are there.
TIP:While you cannot add custom extensions via the portal, it does appear that you can use the “-FileTypes” switch on the “Set-MalwareFilterPolicy” cmdlet to add extensions not in the list of 96.
Office 365
User Experience
Any attachment file extension that you’ve selected will trigger the “Malware Detection Response” in your policy. You have the option to delete the message in it’s entirety or you can replace the attachment with a text file containing a notification.
The default notification looks like this:
Otherwise you can provide custom text in the notification.
The default notification looks like this:
Otherwise you can provide custom text in the notification.
Office 365 Attachment Problem
Testing It Out
You can easily test out the feature by creating a second anti-malware policy (you’ll find CAB enabled by default on it) and applying it to only a subset of users via the options on the “Applied To” tab of the policy.
Give it a try! Let me know what you think in the comments below.
Did you find this article helpful?
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Give it a try! Let me know what you think in the comments below.
Did you find this article helpful?
Leave a comment below or follow me on Twitter (@JoePalarchio) for additional posts and information on Office 365.
Looking to do some more reading on Office 365?
Catch up on my past articles here: Joe Palarchio.