Hi Joseph, I'll cover a few topics here.
For Teams, on our current backlog we are planning to implement a Teams integration to be able to send documents/files to Laserfiche that are shared in teams. This hadn't planned to include chat transcripts though which are exported separately (as .JSON files). Would you be looking to store chat transcripts or just shared documents on Teams?
For Sharepoint, we currently support archiving in 2013/2016 on-premises versions, and we have on our backlog sending documents directly to Laserfiche from Sharepoint Online and Sharepoint 2019.
For Office documents, we have an existing office plug-in that runs on desktop office products and can directly send documents to Laserfiche as well as archiving documents shared across Outlook. We also, have Office Online directly integrated into the repository assuming you are an O365/Office Proplus customer- Details here. This allows you to edit Office documents using the same office interface as office itself on documents within the Laserfiche repository. We are actively developing and improving our tools around our Office integrations as well.
We see many customers using Laserfiche as the records retention tool of choice for documents that are originated in the Sharepoint/Microsoft environment.