Meghan has always denied the claims, which first emerged in March 2021, with her lawyers branding the allegations a “calculated smear campaign”.
Two senior staff came forward with complaints about the duchess’ behaviour, as did her former communications secretary Jason Knauf, who made his first claim in October 2018.
One aide referred to “emotional cruelty and manipulation”, while a different employee who worked with Meghan while she was a senior royal reported feeling “humiliated”.
Meghan vehemently denied these claims from the moment they hit the internet in 2021, her legal team suggesting the timing was deliberate to damage the duchess’ reputation.
It did seem convenient that the claims were made public just hours ahead of her and Harry’s bombshell Oprah Winfrey interview.
In fact, Meghan’s legal team went so far as to claim it was a deliberate move "being used by Buckingham Palace to peddle a wholly false narrative" about Meghan before she spoke publicly on US TV.
At the time Buckingham Palace announced staff were “very concerned” about the allegations and an internal review led by an independent legal team would be conducted.
WATCH: Meghan Markle Opens Up About Having A Right To Privacy In Oprah Interview
Now the investigation has concluded, it has been reported that changes have been made to internal policies for royal staff – but the details remain hidden.
Buckingham Palace has chosen to keep changes and the details of the investigation itself private, raising questions about transparency surrounding royal staff and palace protocol.