We would like the Client Upgrade feature to allow the client to be upgraded outside of maintenance windows but also give the option to only install when no user is logged in, like deploying Applications allow.

There are several areas in the Configuration Manager Console with text fields for entering or pasting scripts. The Scripts feature, CI Detection and Remediation, Application Detection, etc. The font used in these areas is not script friendly. Tabs and spaces are hard to discern and the scripts look downright messy. Using Consolas or another monospaced font would preserve the nice looking formatting you've just copied out of somewhere like VS Code, and would make the script easier to read when you go to look at it later in the ConfigMgr Console. Please change it :)

I would like to be able to easily see which collection that my collection is referenced to.

I can easily see what collections are referenced in my collection, but knowing if I make a change to the membership of x collection then it could effect the membership of y collection would be handy

Enable the use of HTTP and HTTPS locations as source locations for content. With the increaseing use of GitHub and binary repositories like Artifactory the ability to use HTTP locations as content locations for applications and packages would be greatly helpful in managing and distributing the a content in an efficient manner within SCCM.

add a powershell possibility to add repair command to a deploymenttype of an application

Would like to be able to change O365 Channels for Clients in SCCM,
Like you can in GPO... currently GPO wont honor the channel I want because SCCM is managing the O365 Client.

Allow the Invoke-CMScript to pass script parameters. This could be done with a ScriptParameter hashtable similar to how Invoke-CMReport functions.

It would be nice to have the ability to adjust window sizes within the console. As an example, the Membership rule window in the collection properties only has enough room to show 2 lines. Being able to maximize or edit to a custom size and have the console remember these sizes would be great.

This could be incorporated into the fixes that are being introduced with the High DPI resolutions.

When using the PoSh Cmdlet Start-CMApplicationDeployment with Parameter -UpdateSupersedence et to $true the DeadlineDateTime Parameter it ignored if the Application is deployed as Available - I actually states it in a Warning as well.
But with UpdateSupersedence set to true we need the Deadline Parameter again, to not enforce the updates immediately.

We need the ability to deploy application groups with PowerShell.

Similar to Set-CMApplicationDeployment - but for groups.

Add a vendor parameter to Get-CMSoftwareUpdate

This will help identify updates from specific vendors that have been provided through Third-party Software Update Catalogues.

Currently, failover from one SUP to another SUP is always at least 2 hours. Even with the new Boundary Group design, with controllable failovers - the minimum is still 2 hours. Allow admins to control that minimum, and set it smaller than 2 hours.

I would like to script MSIX import in SCCM. Through the console, when you import a msix detection method is created automatically. Add-CMAppxDeploymentType only works with *.appx files. It would be nice to be able to create MSIX deploymenttype like Script, MSI and XAP

When building collections (particularly query collections) it would be handy to be able to preview the devices/users in the collection as written before you commit. Today we have to edit the collection, update membership, refresh then confirm that the membership is correct. If you have a button inside of "Edit Query Statement" it would save a lot of hassle.

Update documentation to reflect where this FormatMessageCtl.dll file is. It is documented as being required to work with status messages but no longer seems to appear in the product. Several locations are shown such as in the ssrs install file as well as inetpub but those no longer seem to hold the file.