No interruption of followers
Moreover, a reply would be also fetched by Odoo as internal, and it would be received exclusively by the initial author.
Screenshots
To send a message privately merely check the box 'Send private'

Private message recipients always know that communication is internal

Replies are also private

Confidential communication
Simultaneously, external partners will never be able to observe internal discussions in the Odoo portal. So, informations is kept confidential.
Screenshots
Confidential messages are not in shown for external partners

Internal messages are recorded but are not sent to followers

Any functional area
For the very special case of sending and printing invoice use this free extension.
Love the APP! Works Great & Even Greater Support!
This was exactly the app that I needed. Odoo Tools responded to request/bugs and fixed them right away. Top-notch! Make sure you check out their other apps also.
Bug reporting
If you encounter bugs or inconsistent behavior, do not hesitate to contact us. We guarantee to provide fixes within 60 days of purchase and are intensely interested in improving our tools even after this period.
You do not need a phone number or credit card to contact us. You should only pass a short email sign-up, which does not take more than 30 seconds.
Please include as many details as possible in your request: screenshots, Odoo server logs, a full description of how to reproduce your problem, and so on. Usually, it takes a few business days to prepare a working plan for an issue (if a bug is confirmed) or provide you with guidelines on what should be done (otherwise).
Public features requests and module ideas (free development)
We are strongly motivated to improve our tools and would be grateful for any feedback. If your requirements are of public use and might be efficiently implemented, the team will include those in our to-do list.
Such a to-do list is processed regularly and does not assume extra fees. Although we cannot promise deadlines and final design, it might be a good way to get desired features without investments and risks.
You do not need a phone number or credit card to contact us. You should only pass a short email sign-up, which does not take more than 30 seconds.
The technical core to synchronize your cloud storage solution with Odoo
The tool to build deep and structured knowledge base for internal and external use. Knowledge System. KMS
The tool for time-based service management from booking appointment to sale and reviews
The tool to set up KPI targets and control their fulfillment by periods
The tool to automatically synchronize Odoo attachments with OneDrive files in both ways
The tool to automatically synchronize Odoo attachments with Google Drive files in both ways