Are five [outlook...] tags sufficient?

Question

I don’t use Outlook and am confused by our tags for that which, in addition to outlook.com-calendar (no Usage guide) include:

outlook.com applied to 253 265 Open Qs, 18 Followers and a Usage guide of:

Outlook.com is a webmail service from Microsoft.

(This has tag hotmail and tag windows-live-mail as synonyms and tag outlook has been suggested as another. At least 19 users have the score necessary to vote on the suggestion, but none have.)

outlook-web-access applied to 32 47 Open Qs, 2 Followers and a Usage guide of:

The Web based e-mail client from Microsoft

Its wiki includes:

Outlook Web App Microsoft's web based client, capable of accessing e-mail,calendars, contacts, tasks, documents.

outlook-365 applied to 10 11 Open Qs, 1 Follower and no Usage guide nor wiki.

outlook applied to 60 59 Open Qs, 6 Followers and a Usage guide of:

For questions regarding Microsoft's webmail service, please use outlook.com as the tag. Questions on the desktop client are off-topic and will be closed.

(A suggestion that this be made a synonym of outlook.com has been pending since April.)

Say for someone who does use "Outlook" is it clear enough which of the above tags to use in which circumstances, or might additional guidance be helpful?

Related:
Outlook vs Outlook.com
How can this Q about Outlook mail forwarding be off topic?
Synonym Request & Rename
Clean up project: Office 365

Answer 1

They are different products.

Outlook.com is Microsoft's Gmail competitor, and used to be Window's Live Mail. It also subsumed Hotmail (thus the synonym).

Outlook 365 is part of the Office 365 suite of products. It combines desktop and web components. Consider its analog to be G Suite.

Outlook Web Access is the classical web interface for an Exchange server. It's different than Outlook 365 in that it pre-dates it by quite a lot and is not really integrated into the rest of the suite. It's meant to be a substitute for Outlook for versions before Office 365.

Outlook is the desktop mail client. It, by itself, is off-topic here, and attracts questions not only about the desktop client, but also questions that should be tagged with one of the other tags above. It'd be great if it was a synonym.

Outlook.com Calendar is the calendar companion to Outlook.com. It's a consumer Google Calendar equivalent.