This advertised application will not be installed (.msi)

Issue

.msi installation package that was originally set up to be installed via Group Policy cannot be installed manually. After double-clicking on the .msi installer, the following error message is displayed.

 This advertised application will not be installed because it might be unsafe

This advertised application will not be installed because it might be unsafe. Contact your administrator to change the installation user interface option of the package to basic.

MS Outlook doesn't save custom emails in "From" field

Issue

Custom email addresses entered into Outlook New Email From: field are not saved as expected. The email is successfully sent using the custom From address, but the user has to enter it manually every time.

Sent emails saved twice in Exchange Shared Mailbox Sent Items

Issue

Office 365 Exchange user has full access to a shared mailbox that is auto-mapped to their Outlook. The Shared mailbox has "Sent Items: Copied to Mailbox" option enabled, which should normally save a copy of sent emails to user's Sent Items, and also to the Shared Mailbox Sent Items.

Sent Items: Copied to Mailbox

This, however, doesn't work as expected and all emails sent as Shared Mailbox are saved twice into Shared Mailbox Sent Items and not saved at all in the user's Sent Items. This seems to be PC/Outlook related and does not happen in Webmail, to other users, or even to the affected user on another PC.

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