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Mon, Feb 26, 2018 11:46 pm

Outlook reports a security problem with an encryption certificate

When I attempted to send a PKI-encrypted email message to several recipients from Microsoft Outlook for Mac 2016 (version 15.41), I saw the message "Encryption certificates for some recipients could not be found in the Outlook Contacts. Do you want to search the Active Directory servers for them?"

Encryption certificates for some recipients could not be found in the 
Outlook Contacts

I clicked on OK and then saw the message "The following recipients have encryption certificates with security problems. Do you still want to send this encrypted message?"

Outlook - encryption certificate with security problem

I clicked on Cancel and checked on whether Outlook was storing a public key certificate for the person in my contacts list. He was in the contact list, but there was no certificate associated with the person in the contacts list when I clicked on the Certificates tab.

[ More Info ]

[/network/email/clients/outlook] permanent link

Wed, Oct 11, 2017 10:20 pm

Error stating Outlook OST file is in use and cannot be accessed

After I rebooted a Windows 10 PC subsequent to a software update on the system, when I attempted to reopen Microsoft Outlook 2016, I saw the message below:

Outlook Data File

Black exclamation
mark in yellow triangle The file C:\Users\jasmith1\AppData\Local\Microsoft\Outlook\ is in use and cannot be accessed. Close any application that is using this file, and then try again. You might need to restart your computer.

[ More Info ]

[/network/email/clients/outlook/2016] permanent link

Mon, May 15, 2017 11:30 pm

Zooming in and out in an email message in Outlook 20016

If the text is too small for you to read or you want to see more text in a given area while editing an email message in the Outlook email client in Microsoft Office 2016 on an Apple laptop, such as a MacBook Pro runing the OS X/macOS operating system, you can do so without changing the font size for text in the message by holding down the control key on the keyboard while scrolling up or down with two fingers on the touchpad. If you run two fingers downwards on the touchpad while holding down the control key, you will zoom in, enlarging the text, while if you run two fingers upwards on the touchpad, you will zoom out, making the text smaller.

[/network/email/clients/outlook/2016] permanent link

Tue, Feb 07, 2017 9:43 pm

Attachments not visible in Outlook 2016

I recently received an update from Microsoft® Office 2011 on my MacBook Pro laptop to Microsoft Office 2016. Included with that update was the 2016 version of Microsoft Outlook for Mac, though if I click on Outlook from Outlook's menu bar and then select About Outlook, I see the following version information (image):

Version 15.27 (161010)
Product ID: 03109-000-000001
License: Volume License

One annoying issue I've encountered is that I don't see a way to view attachments sent with some messages within Outlook. I can see a paperclip icon to the right of the sender's name in the left pane of the outlook window, which indicates the message has been received with an attachment, but in the right pane where the contents of the window is displayed, there is no indication that the message has an attachment. And, if I double-click on the message to open it in a separate window there is no indication the message has an attachment. The only way I've found to easily gain access to the attachment is to view the message in Outlook Web App in a web browser. In its right pane, I see a "To:" line followed by a "CC:" line and then an "Attachments:" line with the name of the attachment shown. I can click on the attachment name to open of save it.

In Outlook 2016, if I right-click on the first message where I observed this problem and choose View Source, I see the following in the header lines, which indicates the message does indeed have an attachment:

Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach: yes

[ More Info ]

[/network/email/clients/outlook/2016] permanent link

Fri, Nov 25, 2016 11:27 pm

Viewing the message header for an email message in Outlook 2013

If you need to view the message header for an email message received with Microsoft Outlook 2013, you can take the following steps:
  1. Double-click on the message for which you wish to view the message header fields to open it in a separate window.
  2. With the Message tab selected, you will see a column with the following items:
    • Mark Unread
    • Categorize
    • Follow Up

    Beneath those items, you will see "Tags". Click on the diagonally, downard-pointing arrow to the right of "Tags".

    Outlook 2013 - Tags

    You will then see a Properties window with an "Internet headers" section where you will see the message header that will show you the return-path, the email servers the message has passed through, etc.

[ More Info ]

[/network/email/clients/outlook/2013] permanent link

Tue, Nov 22, 2016 11:14 pm

Specifying an encryption and signing certificate for an account in Outlook

In Microsoft Outlook for Mac 2011 (version 14.6.7), which is part of the Microsoft Office for Mac 2011 office suite, while composing an email message, you can click on Draft on the top menu bar and then select Security to choose to digitally sign and/or encrypt a message to the recipients.

Outlook 2011 digitally sign and/or encrypt email

If you don't have a signing certificate installed for the account from which you are sending the email, though, when you click on Send, you will see the message "You must first install a valid signing certificate before you can send a digitally signed message. Do you want to send this message without a digital signature?"

Install a valid signing certificate

[ More Info ]

[/network/email/clients/outlook/2011] permanent link

Mon, Oct 24, 2016 10:10 pm

Outlook 2010 0x800CCC91 error - plaintext authentication disallowed

A user who uses Microsoft Office Professional Plus 2010 as his email client reported that he could no longer download email. Whenever the user would check his email, a window would appear prompting him to re-enter his userid and password. Even after I reset his password on the server, the same thing kept happening. At the bottom, right-hand corner of the Outlook window, I saw a "Send/Receive error" messsage next to a yellow triangle with an exclamation mark within it.

Outlook 2010 send receive error

When I clicked on that error message, I saw "reported error (0x800CCC91): 'Your e-mail server rejected your user name. Verify your user name for this account in Account Settings. The server responded -ERR [AUTH] Plaintext authentication disallowed on non-secure (SSL/TLS) connections.'"

[ More Info ]

[/network/email/clients/outlook/2010] permanent link

Thu, Oct 13, 2016 10:38 pm

Viewing an email message header in Outlook 2011

To view the email message headers in Outlook 2011, which is part of Microsoft Office for Mac 2011, right-click on the message and choose View Source.

Outlook 2011 - view source

[/network/email/clients/outlook/2011] permanent link

Sat, Oct 08, 2016 11:00 pm

Creating a signature in Microsoft Outlook for MAC 2011

Email clients often allow you to create a signature block that will automatically be added to the bottom of every email message you compose. Signatures typically contain items such as the sender's name, email address, physical address, phone numbers, company name, etc. To create such a signature in Outlook 2011, which is part of Microsoft Office for Mac 2011, take the following steps inside Outook:

[ More Info ]

[/network/email/clients/outlook] permanent link

Wed, Oct 05, 2016 9:08 pm

Creating local folders in Outlook 2011 on a Mac system

If you wish to create folders in Outlook 2011, which is part of Microsoft Office for Mac 2011, so that you are using less space on a Microsoft Exchange Server, where you might have a quota limiting your mailbox storage, you can create local folders that will result in the email messages being placed in them being stored on your computer's disk drive, instead, of on the server. To do so, you can take the following steps:
  1. Click on Outlook at the top of the top, left-hand corner of the Outlook window.
  2. Select Preferences
  3. Click on General under Personal Settings. In the General settings window, uncheck the check boxes next to "Group similar folders, such as inboxes, from different accounts and "Hide On My Computer folders". You can then close the window by clicking on the red circle at the upper, left-hand corner of the window.
  4. Click on Inbox under ON MY COMPUTER
  5. Click on File then select New and then Folder
  6. When you provide a name for the new folder, it will be placed under the Inbox folder, but you can click on it and drag it up to On MY COMPUTER to put it at the same level in the hierarchy as the Inbox. Once you have a folder at the same level as the Inbox folder, you can create subfolders beneath that folder by clicking on it to select it and then selecting File, New, and Folder from the menu bar.
  7. To copy a message from the Inbox on the server to the ON MY COMPUTER inbox, click on the message and drag it to the new location. If you want to move the message, instead, click on the message to select it then click on Message from the Outlook menu bar then select Move and select the folder you created under ON MY COMPUTER that should hold the message.

[ More Info ]

[/network/email/clients/outlook] permanent link

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