Office 365 CompanyA to CompanyB Calendar Sync Development

For you to be considered for this opportunity I need to feel confident in your ability to develop a solution. Please message me and briefly let me know how you think you can deliver a working solution given the information above. I will not consider anyone who simply submits a bid without reading through this and mentioning to me what their plan will be. ************************************************************************************************************************** In a significant switch of access policies, Company A is now limiting tenant access to its Office 365 platform. This has rendered my previous solution to syncing its calendar to Company B’s Office 365 calendar obsolete. I originally had a Power Automate solution, but Company A limits external tenant access in their Power Platform, so CompanyB is not able to get calendar events synced over using the Office Outlook 365 Calendar connector in Power Automate flow. As such, I require tailored expertise to create a new solution. Your Task: * Develop an Office 365 calendar sync solution between Company A and Company B. Company A syncs to Company B, not the other way around. * The sync solution should feed all events from CompanyA to Company B, including new entries, updates, and deletions, from Company A's calendar to Company B's calendar immediately. * Given the limitations, I am open to any and all viable solutions. Just note Power Automate likely will not work using the Office 356 Calendar connector as I am getting an error, but if there are workarounds I am open to this. Here is a view of the current error... "Sign-in with Azure Active Directory account me@companyB dot com failed, due to a tenant isolation policy for tenant cd75b7dd-4b48-44bd-72e7-e143a22c8mrd. If your use case requires a cross-tenant connection, contact your tenant administrator. Details: Connection owner tenant:" Another option I was thinking of could be finding a way within Microsoft Outlook to simply automate syncing of events from CompanyA to CompanyB by copying the events over using VBA or some Outlook add in, but I am open to any and all workable solutions. Also Company A has limited access to the Google Calendar connector as well. This was a working solution in Power Automate a year ago as well, but they limit the use to Google Calendar connector"... I get an error related to "Data Loss Prevention Policy". ***NOTE I am not an administrator on Company A account so do not have the ability to update the Power Platform tenant policy and will not be able to go through IT for this, incase you all were thinking of using Power Automate*** I am an admin on Company B tenant though. If there are other ways to use Power Automate I am open to ideas, but the two options I mentioned above won't work. Ideal Skills and Experience: * Proven track record in similar projects involving Microsoft’s Office 365 Suite, VBA, App Development, Power Automate * Advanced knowledge of Power Automate or other relevant sync technologies * Demonstrable understanding of calendar access permissions and the ability to work around policies, particularly tenant access limits * Efficient at delivering quick turnarounds considering the immediate need for this solution. Eliminate the barrier of limited tenant access, bid now and let’s connect the calendars and facilitate work across these companies. **I have attached an example of what I am looking to achieve. In Outlook I am able to bring in both Company A and Company B emails, calendars, etc...into Outlook Desktop. When I view calendar I can see both CompA and Comp B, BUT I am wanting to copy and sync any and all events that are in Company A to Company B calendar. In the attached screenshot, lets say I have a meeting that popped up in company A called "Test KTO"... I need to copy this over to my "KE" calendar on the right. Also if someone changes the meeting (Updates time, subject, etc...) for "Test KTO" event, I need it to update on the right side as well in the "Ke" calendar.