It would be great if we could access the Office 365 Usage Report without creating an Azure App like explained here : https://blogs.technet.microsoft.com/dawiese/2017/04/15/get-office365-usage-reports-from-the-microsoft-graph-using-windows-powershell/

Indeed, it's kind of a showstopper for consultants who want to assess a client's Office 365 tenant.

There is a PowerShell ClientID that is already available to consume other GraphAPI feature like this :
https://blogs.technet.microsoft.com/paulomarques/2016/03/21/working-with-azure-active-directory-graph-api-from-powershell/

But if we use it, it fails with:
Invoke-RestMethod : {
"error": {
"code": "InvalidAuthenticationToken",
"message": "Access token validation failure.",
"innerError": {
"request-id": "82702d75-723c-4725-be89-b0bc3a1e95ee",
"date": "2017-04-19T13:10:27"
}
}
}

In VSTO, we can create Application-Level or Document-Level documents. In Office-JS, It seems that at the moment it is a mixture of application level for the ribbon/pane and workbook level for the JS.
This separation is important so developers can sell, for instance, a specific workbook for its own and only own ribbons and panes, or a generic applciation level tool.
A consequence of this request is that it should be possible to attach an office addin (initialization) to a specific document.

Currently it is possible to add only large sized icons in Office Addins ribbon.
It would be great to have smaller icon sized icons.

We are hitting rate limits with the Outlook REST API and there is no way to see what they are, no way to request an increase, and this appears to be the only support channel available.

We would like to have array formula support available in the office.js API. We use these heavily in our VSTO Excel Add-in in combination with user defined functions to display function output in multiple cells. Having this feature available would allow us to build the Excel Office Add-in we would like to build.

For other forum browsers, here is an example of an array formula.
https://www.ablebits.com/office-addins-blog/2015/02/25/array-formulas-functions-excel/#array-formula-intro

Please note that while Binding.setDataAsync() in the office.js API supports adding formulas to a range of cells, you cannot see or edit the formula after adding.

When using the Graph API to interrogate Planner Plans & Tasks, I would like to receive a URL as part of the json, to open the particular plan / task in a browser window.

Currently we cannot set or get publishing image fields using rest. We can get the publishing image fields using REST if you specify /FieldValuesAsText or /FieldValuesAsHtml but we can't get it the way we get all the other properties.

We also cannot use REST to set this property as it throws and error and states that this field does not exist.

This feature prevents use from bulk uploading list items using REST or PNP-sp-js

Similar to how the Graph API allows a screenshot of a chart in Excel to be returned, I would like it to return a screenshot of a plan status chart from Planner.

A limit of 5 is insufficient for my batching needs. Please remove this limitation entirely or raise it to a reasonable number (100+).

As in VBA : for example :

Range("D2:E8").Subtotal GroupBy:=1, Function:=xlSum, TotalList:=Array(2), _
Replace:=True, PageBreaks:=False, SummaryBelowData:=True

Do you plan on adding notifications when fields changes in Outlook?

Useful examples could be when:

An attachment gets added or removed
Email body changes
Email subject changes
Recipients gets added or removed

Considering how rare it is to manage Schema Extensions, it would be best to be able to manage these from Azure Portal and/or in the App Registration pages.

Right now I have a Client Credentials application and to manage Schema Extensions I would have to build a second application just to manage these as I would need to support authorisation with delegated permissions for admin consent. Even the Graph Explorer does not let me manage Schema Extensions right now.

Per http://stackoverflow.com/questions/43889984/microsoft-graph-registering-a-schema-extension

We are also concerned about the issue mentioned on this post:

http://stackoverflow.com/questions/38847193/excel-office-add-in-api-worksheet-protection-password

Currently we are able to protect and unprotect a worksheet. What we need is an API for password protection of worksheets which the end user would not know as this is will make the worksheets on OneDrive more secure for use.

If you open the add-in as a delegated, you can create appointments(compose) in the agenda, you can save the item(appointment) to retreive a itemId but after that you can't create an EWSRequest. If you do so you get the following message.

<m:GetItemResponseMessage ResponseClass="Error">
<m:MessageText>Office extension have no permissions to access any other mailboxes then the mailbox provided in the user context.</m:MessageText>
<m:ResponseCode>ErrorAccessDenied</m:ResponseCode>
<m:DescriptiveLinkKey>0</m:DescriptiveLinkKey>
<m:Items/>
</m:GetItemResponseMessage>

Add functionality to trigger the presentation from within a taskpane add-in.
Add the following function to the library: Document.setActiveViewAsync
Having F5 reload the add-in is rather useless.

Until about 2 weeks ago, we were able to use Mailto: URLs in our SharePoint Online Promoted Links. Now they don't work. When in the list view, the links works fine when clicked on, when in the tile view, nothing happens when you click on the link.
When looking at the source code, the "click action=" is empty.
We have used this extensively for Contact Us pages. Is it a bug, or does SharePoint Online not longer support Mailto: from the Promoted Links Tiles view?

It would be great to avoid tab to be closed by user when saving of the "office-online document" is not finished.
For example by prompting a "confirm" message "Your document is not allready saved, do you really want to close this tab without saving last modifications ?"