Is it permissible for the husband to use the office printer to print personal papers, given that the management has unjustly deducted a portion of his salary?

If the amount is a fixed due to your husband and can only be obtained by using the work printer to print the papers, then there is no harm in that, as long as it does not lead to damage. This is the preponderant opinion on the issue of seizing one's right, provided that no more than the due right is taken.