This is the 14707th most frequent Russian word.
персоналу
The dative case form of "персонал," meaning "to staff" or "to personnel."
Here, 'персоналу' also takes the dative case, showing who the acknowledgments were directed towards.
Благодарности были направлены всему персоналу организации.
Acknowledgments were directed to all the staff of the organization.
In this sentence, 'персоналу' is used in the dative case to identify the group of people (staff) targeted to receive the information.
Пожалуйста, передайте эту информацию нашему персоналу.
Please pass this information to our staff.
In this sentence, 'персоналу' is in the dative case and is used to indicate the recipient of the incentives provided by the company.