The ornamental design for a modularoutdoorserverrack and fan enclosure, as shown and described.
FIG. 1 is a front perspective view of the article;
FIG. 2 is a rear perspective view of the article;
FIG. 3 is a front elevation view of the article;
FIG. 4 is a rear elevation view of the article;
FIG. 5 is a left side elevation view of the article;
FIG. 6 is a right side elevation view of the article;
FIG. 7 is a top plan view of the article; and,
FIG. 8 is a bottom plan view of the article.
The broken lines immediately adjacent the shaded areas represent the bounds of the claimed design while all other broken lines are directed to environment and are for illustrative purposes only; the portions shown in broken lines do not form part of the claimed design.