Last Updated: 2021-07-26
To get your Microsoft Visio symbols/icons which represent the Microsoft Azure Cloud and AI technologies a link at the Microsoft Download Center would be https://www.microsoft.com/en-us/download/details.aspx?id=41937
However, the above link is just a pointer to the Azure Architecture Center. On the page https://docs.microsoft.com/en-us/azure/architecture/icons/ you’ll be able to download the latest set of SVG graphics of Azure Resources.
You can even find more creative ones on the TechNet Gallery at https://gallery.technet.microsoft.com/Collection-of-Integration-e6a3f4d0
As for the Office ones, I’m still looking for an updated link because the link below was last updated in 2016.
As for Microsoft Office products or Microsoft Office 365 deployments including Skype for Business, Microsoft Exchange Server, Microsoft Skype for Business Server, Microsoft Lync Server, and Microsoft SharePoint Server, head over to https://www.microsoft.com/en-us/download/details.aspx?id=35772
Dynamic 365 Icons
Icons for Dynamics 365 can be retrieved from https://docs.microsoft.com/en-us/dynamics365/get-started/icons
Power Platform Icons
Icons for the Power Platform can be downloaded at https://docs.microsoft.com/en-us/power-platform/guidance/icons