Track Changes for MS Outlook (VSTO or JS Add-In)

Dear Developer, We are looking for someone to develop an MS Office Add-in. It should provide the user with the „track changes“-feature of MS Word in MS Outlook. It can be a JavaScript or VSTO add-in (preferably JS because it would work on all platforms). It should resemble the MS Word feature as close as possible. Acceptance criteria: - The „track changes“-feature can be activated and deactivated at the touch of a button. - If activated the add-in shows changes in the text of an e-mail. Deletions are striked out and colored; additions are underlined and colored. - If different people use the add-in on the same text, each gets his/her own color. - Comments can be added to specific characters, words or paragraphs that are shown next to the e-mail text. - Changes of formatting are shown with the new format and automatically create a comments next to the e-mail text. - It’s possible to iterate over all changes and accept or reject them and move to the next change. - This works for all people using the app. - People who do not use the add-in, can see the colored text (that looks like „All Markup“ in MS Word) - The tracking changes feature does not interfere with formatting of the e-mail. - There is a button that accepts or denies all changes in the e-mail. Please do not hesitate to contact us if you have any questions. Best, Thomas