We've just converted the site collections at a client site from path-based site collections to host-named site collection and discovered that calendar with overlays of calendars from other site collections do not work once we've made the switch to HNSC.

Please enable the ability to use calendar overlays using calendars stored in other host-named site collections. This is an issue with host-named site collections that is disappointing considering Microsoft is recommending the use of HNSC.

*English follows Japanese
■Title(件名)：
Microsoft Stream におけるユーザー、グループ、チャンネルごとにクォータ制限を設定する機能について
A feature to set quota limits for individual users, groups, and channels for Microsoft Stream

■Description(内容):
初期作成時に決まった容量を指定し、必要に応じて特定のグループやチャンネルに対して容量を拡張する事を想定しております。そのため、Microsoft Stream におけるユーザー、グループ、チャンネルごとに任意でクォータ制限を設定する機能の実装をお願いいたします。​
We are assuming that capacity is determined and specified at the time of initial creation, and expanded for specific groups or channels as necessary.
For this reason, please implement a feature to set quota limits arbitrarily for each user, group, and channel in Microsoft Stream.

Saving site as a template is only available in onpremise SharePoint. Being able to duplicate a site or save it as template is essential for SharePoint admins' productivity as it is needed to sometimes use the template of another site on a different project or to troubleshoot workflows or errors in SharePoint.

Would like to be able to prevent/hide AD Security Groups(that are used for Group Based Licensing) from showing up in SharePoint Online People Picker. This is necessary to ensure that these groups are not being used for anything outside of licensing entitlements.

SharePoint Admin Center needs to show the correct storage allocation being used by ALL products that take away from a tenant's storage allocation. This would include Office 365 Groups that now create site collections and the Office 365 Video channels that also take away from your total storage allocation. Also, the SharePoint Admin Center should show all site collections (those created from Office 365 Groups and from the Video channel). Right now, no one gets a clear picture of how much storage they are truly using if Video Channels or Office 365 Groups have been created.

Please add the ability to rename sites without needing to create an entirely new Microsoft account.

In order to manage Document Library (how many files are in a Folder) easily, apart from the way to display "Item Child Count" Column on Document Library View, user wants to add a feature that could display the count of file numbers right after each Folder.

SharePointのドキュメントライブラリで、フォルダ内のファイル数表示させたいが、既存の「子アイテムの数」列をビューに表示させる方法以外に、フォルダーの右側に括弧などを付けて、ファイルの数を表示させたいです。

I want to be able to delete or manage comments posted on a modern page. Where can I find a list of comments to manage as an admin? I work in a school and this feature is unusable unless we are able to manage the comments that get posted on a page. Ideally, all comments should go through an approval process before being posted.

It is possible to sent links to specific people with verification
https://techcommunity.microsoft.com/t5/Microsoft-OneDrive-Blog/Introducing-a-new-secure-external-sharing-experience/ba-p/112624/page/2

What would be helpful is to also allow in that specific people share the possibility that the external sharing links via "Share with specific people" expire after a nr. of days.

Currently alerting for storage limits is available for site collections however we use Office 365 Groups Extensively which is not covered under this alerting. As a result, we only receive alerts when we run out of storage space completely. I'd like to see the ability to alert on the SharePoint Online Storage as a whole and not just for site collections

It would be great to be able to create a communication site on / instead of /sites/contoso. Could you please add this ability?

Looks like I'm stuck with the original domain name I chose in the early days of OS365 creation/adoption; ideally I would like to be able to change the domain name, to match my new company name. I'm reliably informed that Microsoft can't do this at present...but its not unusual for a company to change its name and one would expect that SharePoint and associated email accounts, etc could change to suit.

Currently the User Profile synchronisation from Online AD is very limited and does not include the ability to map additional properties. At the very least I would like to see photos automatically synchronised.

At the moment TaxonomySession and other taxonomy infrastructure-related resources and endpoints in the REST API are not supported.

Ideally it would be great to add support for every existing CSOM namespaces such as Publishing, Taxonomy and etc. in REST API, basically the same way as it is implemented for User Profiles.

..those up / down arrows are painful.

Please add the ability to set "show this view in folders of content type" with PowerShell. This field is no editable right now.

The missing possibility of editing leads to a lot of work in our IT department.

Furthermore, please activate this view feature in the modern experience. This great feature deserves to be available in the modern experience...

*English follows Japanese
■Title(件名)：
Stream の動画にて、視聴途中ではなく視聴が完了したかを確認できるようにしたい
We want to check if Stream videos have been viewed completely instead of being unfinished

■Description(内容):
現行の Stream の挙動では、視聴が途中の動画であったとしても、[*回のビュー]​ として表示され、視聴途中か視聴完了したか区別ができません。
また、監査ログにおいても同様に、視聴途中と視聴完了の区別ができません。
視聴が完了したか確認できる機能の実装を希望します。
Currently Stream behaves in a way that even if a video was viewed incompletely, " * views" will be displayed and it is not possible to distinguish whether the video is unfinished or completely viewed.
The same goes for the audit log, it is not possible to distinguish between an unfinished video and a completely viewed video.
We hope that a feature to check if viewing is complete will be implemented.

I would like you to add a feature to disable Allow members to share the site and individual files and folders in the Access Requests Settings in SPO. This option is currently enabled by default, so it would be great if the option is disabled by default when creating a site. And I would like you to implement a feature to restrict sharing sites by tenant-level.

Please make it so that Discussion Boards can be added to the home page of a SharePoint site as a WebPart. Currently, you can have a discussion board app as a separate page, but there is no way to have it included as part of my team's main hub.